Job try-88395a6ce362b6fff2f90fdfe9133e545077f094-debian10-system-python3-0

Failed Tests

• test-acl.t
• test-bookmarks-pushpull.t#b2-binary
• test-bookmarks-pushpull.t#b2-pushkey
• test-bundle2-exchange.t
• test-check-pyflakes.t
• test-clone.t
• test-eol-hook.t
• test-hook.t
• test-http-bad-server.t
• test-http-permissions.t
• test-infinitepush-ci.t
• test-lock-badness.t
• test-narrow-exchange.t#lfs-off
• test-narrow-exchange.t#lfs-on
• test-pending.t
• test-pull-network.t
• test-pull-r.t
• test-push-http.t#bundle2
• test-push.t
• test-remotefilelog-bundles.t
• test-share-safe.t
• test-single-head-obsolescence-named-branch-A2.t
• test-single-head-obsolescence-named-branch-A5.t
• test-single-head.t
• test-ssh-batch.t
• test-static-http.t
• test-subrepo-relative-path.t
• test-transaction-rollback-on-sigpipe.t
• test-treediscovery-legacy.t
• test-util.py
• test-win32text.t

test-acl.t

--- /hgwork/src/tests/test-acl.t
+++ /hgwork/src/tests/test-acl.t.err
@@ -362,7 +362,86 @@
   transaction abort!
   rollback completed
   truncating cache/rbc-revs-v1 to 8
-  abort: acl: user "fred" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -436,7 +515,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "fred" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -507,7 +665,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "barney" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "barney" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -583,7 +820,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "fred" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -658,7 +974,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 479, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -730,7 +1125,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "barney" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "barney" not allowed on "foo/file.txt" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -901,7 +1375,82 @@
   transaction abort!
   rollback completed
   truncating cache/rbc-revs-v1 to 8
-  abort: acl: user "fred" denied on bookmark "moving-bookmark" (changeset "ef1ea85a6374b77d6da9dcda9541f498f2d17df7")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2398, in handlebookmark
+      b'prepushkey', throw=True, **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 401, in hook
+      _pkhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 419, in _pkhook
+      % (user, bookmark, ctx)
+  mercurial.error.Abort: acl: user "fred" denied on bookmark "moving-bookmark" (changeset "ef1ea85a6374b77d6da9dcda9541f498f2d17df7")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1074,7 +1623,86 @@
   transaction abort!
   rollback completed
   truncating cache/rbc-revs-v1 to 8
-  abort: acl: user "wilma" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "wilma" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1148,7 +1776,90 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: $ENOENT$: '../acl.config'
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 446, in _txnhook
+      b'acl.deny',
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/ui.py", line 458, in readconfig
+      fp = open(filename, 'rb')
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 324, in open
+      return builtins.open(name, sysstr(mode), buffering, encoding)
+  FileNotFoundError: [Errno 2] $ENOENT$: b'../acl.config'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1235,7 +1946,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "betty" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  ** Unknown exception encountered with possibly-broken third-party extension "posixgetuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "posixgetuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 487, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "betty" not allowed on "quux/file.py" (changeset "911600dab2ae")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1500,7 +2290,86 @@
   transaction abort!
   rollback completed
   truncating cache/rbc-revs-v1 to 8
-  abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 479, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1672,7 +2541,86 @@
   transaction abort!
   rollback completed
   truncating cache/rbc-revs-v1 to 8
-  abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 479, in _txnhook
+      % (user, f, ctx)
+  mercurial.error.Abort: acl: user "fred" denied on "foo/Bar/file.txt" (changeset "f9cafe1212c8")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   0:6675d58eff77
   
@@ -1689,7 +2637,8 @@
   ** = @unlikelytoexist
   acl: "unlikelytoexist" not defined in [acl.groups]
   error: pretxnchangegroup.acl hook failed: group 'unlikelytoexist' is undefined
-  abort: group 'unlikelytoexist' is undefined
+  KeyError: "getgrnam(): name not found: 'unlikelytoexist'"
+  mercurial.error.Abort: group 'unlikelytoexist' is undefined
 
 
 Branch acl tests setup
@@ -1883,7 +2832,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "astro" denied on branch "foobar" (changeset "e8fc755d4d82")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 461, in _txnhook
+      % (user, branch, ctx)
+  mercurial.error.Abort: acl: user "astro" denied on branch "foobar" (changeset "e8fc755d4d82")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   2:fb35475503ef
   
@@ -1955,7 +2983,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "astro" not allowed on branch "default" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 469, in _txnhook
+      % (user, branch, ctx)
+  mercurial.error.Abort: acl: user "astro" not allowed on branch "default" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   2:fb35475503ef
   
@@ -2029,7 +3136,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "astro" not allowed on branch "default" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 469, in _txnhook
+      % (user, branch, ctx)
+  mercurial.error.Abort: acl: user "astro" not allowed on branch "default" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   2:fb35475503ef
   
@@ -2280,7 +3466,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "george" denied on branch "default" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 461, in _txnhook
+      % (user, branch, ctx)
+  mercurial.error.Abort: acl: user "george" denied on branch "default" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   2:fb35475503ef
   
@@ -2438,7 +3703,86 @@
   bundle2-input-bundle: 5 parts total
   transaction abort!
   rollback completed
-  abort: acl: user "george" denied on branch "default" (changeset "ef1ea85a6374")
+  ** Unknown exception encountered with possibly-broken third-party extension "f" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "f" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: acl, f, posixgetuser
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 403, in hook
+      _txnhook(ui, repo, hooktype, node, source, user, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/acl.py", line 461, in _txnhook
+      % (user, branch, ctx)
+  mercurial.error.Abort: acl: user "george" denied on branch "default" (changeset "ef1ea85a6374")
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   no rollback information available
   2:fb35475503ef
   

test-bookmarks-pushpull.t#b2-binary

--- /hgwork/src/tests/test-bookmarks-pushpull.t
+++ /hgwork/src/tests/test-bookmarks-pushpull.t#b2-binary.err
@@ -1234,8 +1234,77 @@
   pushing to $TESTTMP/issue4455-dest
   searching for changes
   no changes found
-  abort: prepushkey hook exited with status 1
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2398, in handlebookmark
+      b'prepushkey', throw=True, **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: prepushkey hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 #endif
 

test-bookmarks-pushpull.t#b2-pushkey

--- /hgwork/src/tests/test-bookmarks-pushpull.t
+++ /hgwork/src/tests/test-bookmarks-pushpull.t#b2-pushkey.err
@@ -1224,8 +1224,69 @@
   searching for changes
   no changes found
   pushkey-abort: prepushkey hook exited with status 1
-  abort: exporting bookmark @ failed
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2354, in handlepushkey
+      partid=b'%d' % inpart.id, **pycompat.strkwargs(kwargs)
+  mercurial.error.PushkeyFailed: failed to update value for "bookmarks/@"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 #endif
 #if b2-binary

test-bundle2-exchange.t

--- /hgwork/src/tests/test-bundle2-exchange.t
+++ /hgwork/src/tests/test-bundle2-exchange.t.err
@@ -526,9 +526,71 @@
   $ hg -R main push other -r e7ec4e813ba6
   pushing to other
   searching for changes
-  abort: Abandon ship!
-  (don't panic)
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "$TESTTMP/failpush.py", line 33, in handleabort
+      raise error.Abort(b'Abandon ship!', hint=b"don't panic")
+  mercurial.error.Abort: Abandon ship!
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
@@ -557,8 +619,71 @@
   $ hg -R main push other -r e7ec4e813ba6
   pushing to other
   searching for changes
-  abort: missing support for test:unknown
-  [100]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 554, in _processpart
+      handler = _gethandler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 513, in _gethandler
+      raise error.BundleUnknownFeatureError(parttype=part.type)
+  mercurial.error.BundleUnknownFeatureError: b'test:unknown'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
@@ -582,9 +707,78 @@
   $ hg -R main push other -r e7ec4e813ba6
   pushing to other
   searching for changes
-  abort: push failed:
-  'remote repository changed while pushing - please try again'
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2192, in handlecheckheads
+      b'remote repository changed while pushing - please try again'
+  mercurial.error.PushRaced: b'remote repository changed while pushing - please try again'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 437, in unbundle
+      _(b'push failed:'), stringutil.forcebytestr(exc)
+  mercurial.error.ResponseError: (b'push failed:', 'remote repository changed while pushing - please try again')
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
@@ -625,8 +819,77 @@
   remote: transaction abort!
   remote: Cleaning up the mess...
   remote: rollback completed
-  abort: pretxnclose.failpush hook exited with status 1
-  [40]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2489, in validate
+      b'pretxnclose', throw=True, **pycompat.strkwargs(tr.hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: pretxnclose.failpush hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
@@ -686,8 +949,83 @@
   remote: transaction abort!
   remote: Cleaning up the mess...
   remote: rollback completed
-  abort: pretxnchangegroup hook exited with status 1
-  [40]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: pretxnchangegroup hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
   searching for changes
@@ -734,8 +1072,83 @@
   transaction abort!
   Cleaning up the mess...
   rollback completed
-  abort: pretxnchangegroup hook exited with status 1
-  [40]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: pretxnchangegroup hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
   searching for changes
@@ -809,8 +1222,71 @@
   transaction abort!
   Cleaning up the mess...
   rollback completed
-  abort: Correct phase push failed (because hooks)
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush, mandatorypart
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2354, in handlepushkey
+      partid=b'%d' % inpart.id, **pycompat.strkwargs(kwargs)
+  mercurial.error.PushkeyFailed: failed to update value for "phases/cd010b8cd998f3981a5a8115f94f8da4ab506089"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
   searching for changes
@@ -877,8 +1353,71 @@
   pushkey: lock state after "phases"
   lock:  free
   wlock: free
-  abort: Clown phase push failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "failpush" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "failpush" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: failpush, mandatorypart
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2354, in handlepushkey
+      partid=b'%d' % inpart.id, **pycompat.strkwargs(kwargs)
+  mercurial.error.PushkeyFailed: failed to update value for "phases/cd010b8cd998f3981a5a8115f94f8da4ab506089"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
   searching for changes

test-check-pyflakes.t

--- /hgwork/src/tests/test-check-pyflakes.t
+++ /hgwork/src/tests/test-check-pyflakes.t.err
@@ -24,4 +24,46 @@
   mercurial/util.py:*:* undefined name 'file' (glob) (?)
   mercurial/encoding.py:*:* undefined name 'localstr' (glob) (?)
   tests/run-tests.py:*:* undefined name 'PermissionError' (glob) (?)
+  mercurial/error.py:21: 'typing.Any' imported but unused
+  mercurial/error.py:21: 'typing.AnyStr' imported but unused
+  mercurial/error.py:21: 'typing.Iterable' imported but unused
+  mercurial/error.py:21: 'typing.List' imported but unused
+  mercurial/error.py:21: 'typing.Optional' imported but unused
+  mercurial/error.py:21: 'typing.Sequence' imported but unused
+  mercurial/error.py:21: 'typing.Union' imported but unused
+  mercurial/hgweb/server.py:422: undefined name 'reload'
+  mercurial/i18n.py:22: 'typing.Callable' imported but unused
+  mercurial/i18n.py:22: 'typing.List' imported but unused
+  mercurial/logcmdutil.py:44: 'typing.Sequence' imported but unused
+  mercurial/pathutil.py:17: 'typing.Any' imported but unused
+  mercurial/pathutil.py:17: 'typing.Callable' imported but unused
+  mercurial/pathutil.py:17: 'typing.Iterator' imported but unused
+  mercurial/pathutil.py:17: 'typing.Optional' imported but unused
+  mercurial/phases.py:129: 'typing.Any' imported but unused
+  mercurial/phases.py:129: 'typing.Iterable' imported but unused
+  mercurial/phases.py:129: 'typing.Optional' imported but unused
+  mercurial/phases.py:129: 'typing.Tuple' imported but unused
+  mercurial/phases.py:139: '.ui as uimod' imported but unused
+  mercurial/subrepoutil.py:33: 'typing.Any' imported but unused
+  mercurial/subrepoutil.py:33: 'typing.List' imported but unused
+  mercurial/subrepoutil.py:33: 'typing.Optional' imported but unused
+  mercurial/subrepoutil.py:33: 'typing.Set' imported but unused
+  mercurial/subrepoutil.py:41: '.context' imported but unused
+  mercurial/subrepoutil.py:41: '.localrepo' imported but unused
+  mercurial/subrepoutil.py:41: '.match as matchmod' imported but unused
+  mercurial/subrepoutil.py:41: '.scmutil' imported but unused
+  mercurial/subrepoutil.py:41: '.subrepo' imported but unused
+  mercurial/subrepoutil.py:41: '.ui as uimod' imported but unused
+  mercurial/upgrade_utils/actions.py:22: 'typing.List' imported but unused
+  mercurial/upgrade_utils/actions.py:22: 'typing.Type' imported but unused
+  mercurial/util.py:62: 'typing.Iterator' imported but unused
+  mercurial/util.py:62: 'typing.List' imported but unused
+  mercurial/util.py:62: 'typing.Optional' imported but unused
+  mercurial/util.py:62: 'typing.Tuple' imported but unused
+  mercurial/utils/dateutil.py:21: 'typing.Callable' imported but unused
+  mercurial/utils/dateutil.py:21: 'typing.Dict' imported but unused
+  mercurial/utils/dateutil.py:21: 'typing.Iterable' imported but unused
+  mercurial/utils/dateutil.py:21: 'typing.Optional' imported but unused
+  mercurial/utils/dateutil.py:21: 'typing.Union' imported but unused
+  mercurial/utils/urlutil.py:29: 'typing.Union' imported but unused
   

test-clone.t

--- /hgwork/src/tests/test-clone.t
+++ /hgwork/src/tests/test-clone.t.err
@@ -827,15 +827,85 @@
 Clone with auto share from a repo with filtered revision 0 should not result in share
 
   $ hg --config share.pool=share clone filteredrev0 share-filtered
-  (not using pooled storage: unable to resolve identity of remote)
-  requesting all changes
-  adding changesets
-  adding manifests
-  adding file changes
-  added 1 changesets with 1 changes to 1 files
-  new changesets e082c1832e09
-  updating to branch default
-  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: share
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 1904, in __getitem__
+      node = self.changelog.node(changeid)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/repoview.py", line 342, in node
+      raise error.FilteredIndexError(rev)
+  mercurial.error.FilteredIndexError: 0
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 629, in revsymbol
+      return repo[r]
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 1945, in __getitem__
+      _(b"filtered revision '%s'") % pycompat.bytestr(changeid)
+  mercurial.error.FilteredRepoLookupError: b"filtered revision '0'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 395, in lookup
+      return self._repo.lookup(key)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2182, in lookup
+      node = scmutil.revsymbol(self, key).node()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 667, in revsymbol
+      raise _filterederror(repo, symbol)
+  mercurial.error.FilteredRepoLookupError: b"filtered revision '0' (not in 'served' subset)"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/share.py", line 162, in clone
+      return orig(ui, source, *args, **opts)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 764, in clone
+      b'key': b'0',
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Clone from repo with content should result in shared store being created
 

test-eol-hook.t

--- /hgwork/src/tests/test-eol-hook.t
+++ /hgwork/src/tests/test-eol-hook.t.err
@@ -43,9 +43,86 @@
     a.txt in a8ee6548cd86 should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 346, in checkheadshook
+      _checkhook(ui, repo, node, True)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
     a.txt in a8ee6548cd86 should not have CRLF line endings
-  [255]
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ printf "first
second
third
" > a.txt
   $ hg commit -m 'LF a.txt (fixed)'
@@ -70,9 +147,86 @@
     crlf.txt in 004ba2132725 should not have LF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 346, in checkheadshook
+      _checkhook(ui, repo, node, True)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
     crlf.txt in 004ba2132725 should not have LF line endings
-  [255]
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ printf "first
second
third
" > crlf.txt
   $ hg commit -m 'CRLF crlf.txt (fixed)'
@@ -97,9 +251,86 @@
     b.txt in fbcf9b1025f5 should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
-    b.txt in fbcf9b1025f5 should not have CRLF line endings
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 346, in checkheadshook
+      _checkhook(ui, repo, node, True)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
+    b.txt in fbcf9b1025f5 should not have CRLF line endings
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg up -r -2
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
@@ -117,9 +348,86 @@
     b.txt in fbcf9b1025f5 should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
-    b.txt in fbcf9b1025f5 should not have CRLF line endings
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 346, in checkheadshook
+      _checkhook(ui, repo, node, True)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
+    b.txt in fbcf9b1025f5 should not have CRLF line endings
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Test checkheadshook alias
 
@@ -137,9 +445,86 @@
     b.txt in fbcf9b1025f5 should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
-    b.txt in fbcf9b1025f5 should not have CRLF line endings
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 346, in checkheadshook
+      _checkhook(ui, repo, node, True)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
+    b.txt in fbcf9b1025f5 should not have CRLF line endings
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 We can fix the head and push again
 
@@ -173,9 +558,86 @@
     b.txt in fbcf9b1025f5 should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
-    b.txt in fbcf9b1025f5 should not have CRLF line endings
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 341, in checkallhook
+      _checkhook(ui, repo, node, False)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
+    b.txt in fbcf9b1025f5 should not have CRLF line endings
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 But we can push the clean head
 
@@ -203,9 +665,86 @@
     d.txt in a7040e68714f should not have CRLF line endings
   transaction abort!
   rollback completed
-  abort: end-of-line check failed:
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: eol
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 341, in checkallhook
+      _checkhook(ui, repo, node, False)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/eol.py", line 335, in _checkhook
+      _(b"end-of-line check failed:
") + b"
".join(msgs)
+  mercurial.error.Abort: end-of-line check failed:
     b.txt in fbcf9b1025f5 should not have CRLF line endings
     d.txt in a7040e68714f should not have CRLF line endings
-  [255]
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ cd ..

test-hook.t

--- /hgwork/src/tests/test-hook.t
+++ /hgwork/src/tests/test-hook.t.err
@@ -644,8 +644,77 @@
   HG_TXNNAME=push
   HG_URL=file:$TESTTMP/a
   
-  abort: prepushkey hook exited with status 1
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2398, in handlebookmark
+      b'prepushkey', throw=True, **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: prepushkey hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ cd ../a
 
 test that prelistkeys can prevent listing keys
@@ -679,8 +748,65 @@
   HG_HOOKTYPE=prelistkeys
   HG_NAMESPACE=bookmarks
   
-  abort: prelistkeys hook exited with status 1
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 392, in listkeys
+      return self._repo.listkeys(namespace)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 3439, in listkeys
+      self.hook(b'prelistkeys', throw=True, namespace=namespace)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: prelistkeys hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5430, in pull
+      b'listkeys', {b'namespace': b'bookmarks'}
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ cd ../a
   $ rm .hg/hgrc
 
@@ -786,8 +912,75 @@
   HG_HOOKTYPE=preoutgoing
   HG_SOURCE=pull
   
-  abort: preoutgoing.forbid hook exited with status 1
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: preoutgoing.forbid hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 outgoing hooks work for local clones
 
@@ -903,8 +1096,77 @@
   pulling from ../a
   searching for changes
   error: preoutgoing.abort hook failed: raise abort from hook
-  abort: raise abort from hook
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "$TESTTMP/b/hooktests.py", line 29, in aborthook
+      raise error.Abort(b'raise abort from hook')
+  mercurial.error.Abort: raise abort from hook
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.fail = python:hooktests.failhook' >> ../a/.hg/hgrc
@@ -914,59 +1176,584 @@
   hook args:
     hooktype preoutgoing
     source pull
-  abort: preoutgoing.fail hook failed
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 142, in pythonhook
+      raise error.HookAbort(_(b'%s hook failed') % hname)
+  mercurial.error.HookAbort: preoutgoing.fail hook failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.uncallable = python:hooktests.uncallable' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.uncallable hook is invalid: "hooktests.uncallable" is not callable
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 109, in pythonhook
+      % (hname, funcname)
+  mercurial.error.HookLoadError: preoutgoing.uncallable hook is invalid: "hooktests.uncallable" is not callable
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.nohook = python:hooktests.nohook' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.nohook hook is invalid: "hooktests.nohook" is not defined
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 100, in pythonhook
+      obj = getattr(obj, p)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 309, in w
+      return f(object, sysstr(name), *args)
+  AttributeError: module 'hooktests' has no attribute 'nohook'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 104, in pythonhook
+      % (hname, funcname)
+  mercurial.error.HookLoadError: preoutgoing.nohook hook is invalid: "hooktests.nohook" is not defined
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.nomodule = python:nomodule' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.nomodule hook is invalid: "nomodule" not in a module
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 49, in pythonhook
+      % (hname, funcname)
+  mercurial.error.HookLoadError: preoutgoing.nomodule hook is invalid: "nomodule" not in a module
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.badmodule = python:nomodule.nowhere' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.badmodule hook is invalid: import of "nomodule" failed
-  (run with --traceback for stack trace)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 61, in pythonhook
+      obj = __import__(pycompat.sysstr(modname))
+  ModuleNotFoundError: No module named 'nomodule'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 66, in pythonhook
+      obj = __import__("hgext_%s" % pycompat.sysstr(modname))
+  ModuleNotFoundError: No module named 'hgext_nomodule'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 95, in pythonhook
+      hint=tracebackhint,
+  mercurial.error.HookLoadError: preoutgoing.badmodule hook is invalid: import of "nomodule" failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.unreachable = python:hooktests.container.unreachable' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.unreachable hook is invalid: import of "hooktests.container" failed
-  (run with --traceback for stack trace)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 61, in pythonhook
+      obj = __import__(pycompat.sysstr(modname))
+  ModuleNotFoundError: No module named 'hooktests.container'; 'hooktests' is not a package
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 66, in pythonhook
+      obj = __import__("hgext_%s" % pycompat.sysstr(modname))
+  ModuleNotFoundError: No module named 'hgext_hooktests'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 95, in pythonhook
+      hint=tracebackhint,
+  mercurial.error.HookLoadError: preoutgoing.unreachable hook is invalid: import of "hooktests.container" failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.syntaxerror = python:syntaxerror.syntaxerror' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
-  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
-  (run with --traceback for stack trace)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 61, in pythonhook
+      obj = __import__(pycompat.sysstr(modname))
+    File "<frozen importlib._bootstrap>", line 983, in _find_and_load
+    File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
+    File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgdemandimport/demandimportpy3.py", line 52, in exec_module
+      self.loader.exec_module(module)
+    File "$TESTTMP/b/syntaxerror.py", line 1
+      (foo
+         ^
+  SyntaxError: unexpected EOF while parsing
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 66, in pythonhook
+      obj = __import__("hgext_%s" % pycompat.sysstr(modname))
+  ModuleNotFoundError: No module named 'hgext_syntaxerror'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 373, in getbundle
+      **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2377, in getbundlechunks
+      **pycompat.strkwargs(kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2436, in _getbundlechangegrouppart
+      remote_sidedata=remote_sidedata,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1918, in makestream
+      repo.hook(b'preoutgoing', throw=True, source=source)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 95, in pythonhook
+      hint=tracebackhint,
+  mercurial.error.HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg pull ../a --traceback 2>&1 | egrep 'pulling|searching|^exception|Traceback|SyntaxError|ImportError|ModuleNotFoundError|HookLoadError|abort'
   pulling from ../a
@@ -988,7 +1775,14 @@
   Traceback (most recent call last): (py3 !)
       raise error.HookLoadError( (py38 !)
   mercurial.error.HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed (py3 !)
-  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
+  Traceback (most recent call last):
+  Traceback (most recent call last):
+  SyntaxError: unexpected EOF while parsing
+  Traceback (most recent call last):
+  ModuleNotFoundError: No module named 'hgext_syntaxerror'
+  Traceback (most recent call last):
+  mercurial.error.HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
+  Traceback (most recent call last):
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.pass = python:hooktests.passhook' >> ../a/.hg/hgrc

test-http-bad-server.t

--- /hgwork/src/tests/test-http-bad-server.t
+++ /hgwork/src/tests/test-http-bad-server.t.err
@@ -158,8 +158,100 @@
   $ cat hg.pid > $DAEMON_PIDS
   $ hg clone http://localhost:$HGPORT/ clone
   requesting all changes
-  abort: error: bad HTTP status line: * (glob)
-  [100]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeversion" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeversion" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 4.2)
+  ** Extensions loaded: badserver, fakeversion
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/keepalive.py", line 241, in do_open
+      r = h.getresponse()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 207, in getresponse
+      return keepalive.HTTPConnection.getresponse(self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/keepalive.py", line 459, in safegetresponse
+      return cls.getresponse(self)
+    File "/usr/lib/python3.7/http/client.py", line 1352, in getresponse
+      response.begin()
+    File "/usr/lib/python3.7/http/client.py", line 310, in begin
+      version, status, reason = self._read_status()
+    File "/usr/lib/python3.7/http/client.py", line 279, in _read_status
+      raise RemoteDisconnected("Remote end closed connection without"
+  http.client.RemoteDisconnected: Remote end closed connection without response
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 459, in getbundle
+      f = self._callcompressable(b"getbundle", **pycompat.strkwargs(opts))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 526, in _callcompressable
+      return self._callstream(cmd, _compressible=True, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 525, in open
+      response = self._open(req, data)
+    File "/usr/lib/python3.7/urllib/request.py", line 543, in _open
+      '_open', req)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 332, in http_open
+      return self.do_open(httpconnection, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/keepalive.py", line 246, in do_open
+      _(b'bad HTTP status line: %s') % pycompat.sysbytes(err.line)
+  urllib.error.URLError: <urlopen error b"bad HTTP status line: ''">
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 957, in clone
+      depth=depth,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py $DAEMON_PIDS
 
@@ -441,12 +533,73 @@
 
   $ hg clone http://localhost:$HGPORT/ clone
   requesting all changes
-  abort: 'http://localhost:$HGPORT/' does not appear to be an hg repository:
-  ---%<--- (application/mercuri)
-  
-  ---%<---
-  
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeversion" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeversion" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 4.2)
+  ** Extensions loaded: badserver, fakeversion
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 459, in getbundle
+      f = self._callcompressable(b"getbundle", **pycompat.strkwargs(opts))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 526, in _callcompressable
+      return self._callstream(cmd, _compressible=True, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 454, in _callstream
+      self.ui, self._url, cu, qs, resp, _compressible
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 350, in parsev1commandresponse
+      raise error.RepoError(msg)
+  mercurial.error.RepoError: b"'http://localhost:$HGPORT/' does not appear to be an hg repository:
---%<--- (application/mercuri)

---%<---
"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 957, in clone
+      depth=depth,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py $DAEMON_PIDS
 
@@ -504,8 +657,75 @@
 
   $ hg clone http://localhost:$HGPORT/ clone
   requesting all changes
-  abort: stream ended unexpectedly (got 0 bytes, expected 1)
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeversion" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeversion" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 4.2)
+  ** Extensions loaded: badserver, fakeversion
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 459, in getbundle
+      f = self._callcompressable(b"getbundle", **pycompat.strkwargs(opts))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 526, in _callcompressable
+      return self._callstream(cmd, _compressible=True, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 454, in _callstream
+      self.ui, self._url, cu, qs, resp, _compressible
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 370, in parsev1commandresponse
+      elen = struct.unpack(b'B', util.readexactly(resp, 1))[0]
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3170, in readexactly
+      % (len(s), n)
+  mercurial.error.Abort: stream ended unexpectedly (got 0 bytes, expected 1)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 957, in clone
+      depth=depth,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py $DAEMON_PIDS
 
@@ -542,9 +762,108 @@
 
   $ hg clone http://localhost:$HGPORT/ clone
   requesting all changes
-  abort: HTTP request error (incomplete response)
-  (this may be an intermittent network failure; if the error persists, consider contacting the network or server operator)
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeversion" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeversion" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 4.2)
+  ** Extensions loaded: badserver, fakeversion
+  Traceback (most recent call last):
+    File "/usr/lib/python3.7/http/client.py", line 558, in _get_chunk_left
+      chunk_left = self._read_next_chunk_size()
+    File "/usr/lib/python3.7/http/client.py", line 525, in _read_next_chunk_size
+      return int(line, 16)
+  ValueError: invalid literal for int() with base 16: b''
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/usr/lib/python3.7/http/client.py", line 590, in _readinto_chunked
+      chunk_left = self._get_chunk_left()
+    File "/usr/lib/python3.7/http/client.py", line 560, in _get_chunk_left
+      raise IncompleteRead(b'')
+  http.client.IncompleteRead: IncompleteRead(0 bytes read)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 691, in read
+      return origread(size)
+    File "/usr/lib/python3.7/http/client.py", line 461, in read
+      n = self.readinto(b)
+    File "/usr/lib/python3.7/http/client.py", line 495, in readinto
+      return self._readinto_chunked(b)
+    File "/usr/lib/python3.7/http/client.py", line 606, in _readinto_chunked
+      raise IncompleteRead(bytes(b[0:total_bytes]))
+  http.client.IncompleteRead: IncompleteRead(0 bytes read)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 459, in getbundle
+      f = self._callcompressable(b"getbundle", **pycompat.strkwargs(opts))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 526, in _callcompressable
+      return self._callstream(cmd, _compressible=True, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 454, in _callstream
+      self.ui, self._url, cu, qs, resp, _compressible
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 370, in parsev1commandresponse
+      elen = struct.unpack(b'B', util.readexactly(resp, 1))[0]
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3166, in readexactly
+      s = stream.read(n)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 707, in read
+      b'this may be an intermittent network failure; '
+  mercurial.error.PeerTransportError: HTTP request error (incomplete response)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 957, in clone
+      depth=depth,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py $DAEMON_PIDS
 
@@ -663,9 +982,95 @@
 
   $ hg clone http://localhost:$HGPORT/ clone
   requesting all changes
-  abort: HTTP request error (incomplete response) (py3 !)
-  (this may be an intermittent network failure; if the error persists, consider contacting the network or server operator)
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeversion" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeversion" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 4.2)
+  ** Extensions loaded: badserver, fakeversion
+  Traceback (most recent call last):
+    File "/usr/lib/python3.7/http/client.py", line 595, in _readinto_chunked
+      n = self._safe_readinto(mvb)
+    File "/usr/lib/python3.7/http/client.py", line 642, in _safe_readinto
+      raise IncompleteRead(bytes(mvb[0:total_bytes]), len(b))
+  http.client.IncompleteRead: IncompleteRead(1 bytes read, 4 more expected)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 691, in read
+      return origread(size)
+    File "/usr/lib/python3.7/http/client.py", line 461, in read
+      n = self.readinto(b)
+    File "/usr/lib/python3.7/http/client.py", line 495, in readinto
+      return self._readinto_chunked(b)
+    File "/usr/lib/python3.7/http/client.py", line 606, in _readinto_chunked
+      raise IncompleteRead(bytes(b[0:total_bytes]))
+  http.client.IncompleteRead: IncompleteRead(0 bytes read)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 461, in getbundle
+      return bundle2.getunbundler(self.ui, f)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3166, in readexactly
+      s = stream.read(n)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/url.py", line 707, in read
+      b'this may be an intermittent network failure; '
+  mercurial.error.PeerTransportError: HTTP request error (incomplete response)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 957, in clone
+      depth=depth,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py $DAEMON_PIDS
 

test-http-permissions.t

--- /hgwork/src/tests/test-http-permissions.t
+++ /hgwork/src/tests/test-http-permissions.t.err
@@ -873,14 +873,156 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: HTTP Error 403: ssl required
-  [100]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 403: ssl required
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: HTTP Error 403: ssl required
-  [100]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 403: ssl required
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -936,14 +1078,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -993,14 +1291,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -1056,14 +1510,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -1113,14 +1723,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -1286,14 +2052,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 
@@ -1411,14 +2333,170 @@
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg --cwd ../test2 push http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "fakeremoteuser" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "fakeremoteuser" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: fakeremoteuser, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ killdaemons.py
 

test-infinitepush-ci.t

--- /hgwork/src/tests/test-infinitepush-ci.t
+++ /hgwork/src/tests/test-infinitepush-ci.t.err
@@ -203,8 +203,59 @@
 
   $ hg pull -r b4e4bce660512ad3e71189e14588a70ac8e31fef
   pulling from $TESTTMP/repo
-  abort: unknown revision 'b4e4bce660512ad3e71189e14588a70ac8e31fef'
-  [10]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: infinitepush
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 395, in lookup
+      return self._repo.lookup(key)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2182, in lookup
+      node = scmutil.revsymbol(self, key).node()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 658, in revsymbol
+      raise error.RepoLookupError(_(b"unknown revision '%s'") % symbol)
+  mercurial.error.RepoLookupError: b"unknown revision 'b4e4bce660512ad3e71189e14588a70ac8e31fef'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg glog
   o  1:6cb0989601f1 added a
   |  public
@@ -240,8 +291,67 @@
 XXX: we should support this
   $ hg pull -r b4e4bce660512
   pulling from ssh://user@dummy/repo
-  abort: unknown revision 'b4e4bce660512'
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 316, in _readbatchresponse
+      result = decode(remoteresult)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 353, in decode
+      self._abort(error.RepoError(data))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/sshpeer.py", line 442, in _abort
+      raise exception
+  mercurial.error.RepoError: b"unknown revision 'b4e4bce660512'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 126, in __exit__
+      self.close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 279, in close
+      self._responsef.result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 432, in result
+      return self.__get_result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
+      raise self._exception
+    File "/usr/lib/python3.7/concurrent/futures/thread.py", line 57, in run
+      result = self.fn(*self.args, **self.kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 318, in _readbatchresponse
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 XXX: we should show better message when the pull is happening from bundlestore
   $ hg pull -r b4e4bce660512ad3e71189e14588a70ac8e31fef

test-lock-badness.t

--- /hgwork/src/tests/test-lock-badness.t
+++ /hgwork/src/tests/test-lock-badness.t.err
@@ -135,7 +135,83 @@
   $ hg -R b push a
   pushing to a
   searching for changes
-  abort: could not lock repository a: Permission denied
-  [20]
+  ** Unknown exception encountered with possibly-broken third-party extension "testlock" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "testlock" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: testlock
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/lock.py", line 278, in _trylock
+      self.vfs.makelock(lockname, self.f)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/vfs.py", line 201, in makelock
+      return util.makelock(info, self.join(path))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 2154, in makelock
+      ld = os.open(pathname, flags)
+  PermissionError: [Errno 13] Permission denied: b'$TESTTMP/a/.hg/store/lock'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2692, in unbundle
+      gettransaction()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2680, in gettransaction
+      lockandtr[1] = repo.lock()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 3015, in lock
+      desc=_(b'repository %s') % self.origroot,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2980, in _lock
+      signalsafe=signalsafe,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/lock.py", line 151, in trylock
+      l._trylock()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/lock.py", line 296, in _trylock
+      why.errno, why.strerror, why.filename, self.desc
+  mercurial.error.LockUnavailable: [Errno 13] Permission denied: b'$TESTTMP/a/.hg/store/lock'
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ chmod 700 a/.hg/store

test-narrow-exchange.t#lfs-off

--- /hgwork/src/tests/test-narrow-exchange.t
+++ /hgwork/src/tests/test-narrow-exchange.t#lfs-off.err
@@ -107,8 +107,65 @@
   remote: rollback completed
   remote: abort: data/inside2/f@4a1aa07735e673e20c00fae80f40dc301ee30616: unknown parent (reporevlogstore !)
   remote: abort: data/inside2/f/index@4a1aa07735e6: no node (reposimplestore !)
-  abort: stream ended unexpectedly (got 0 bytes, expected 4)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: narrow
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 503, in unbundle
+      ret = bundle2.getunbundler(self.ui, stream)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3170, in readexactly
+      % (len(s), n)
+  mercurial.error.Abort: stream ended unexpectedly (got 0 bytes, expected 4)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Can pull from wider repo if change affects only paths outside remote's
 narrow spec

test-narrow-exchange.t#lfs-on

--- /hgwork/src/tests/test-narrow-exchange.t
+++ /hgwork/src/tests/test-narrow-exchange.t#lfs-on.err
@@ -107,8 +107,67 @@
   remote: rollback completed
   remote: abort: data/inside2/f@4a1aa07735e673e20c00fae80f40dc301ee30616: unknown parent (reporevlogstore !)
   remote: abort: data/inside2/f/index@4a1aa07735e6: no node (reposimplestore !)
-  abort: stream ended unexpectedly (got 0 bytes, expected 4)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: lfs, narrow
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 503, in unbundle
+      ret = bundle2.getunbundler(self.ui, stream)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3170, in readexactly
+      % (len(s), n)
+  mercurial.error.Abort: stream ended unexpectedly (got 0 bytes, expected 4)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/lfs/wrapper.py", line 432, in push
+      return orig(repo, remote, *args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Can pull from wider repo if change affects only paths outside remote's
 narrow spec
@@ -222,4 +281,63 @@
   remote: transaction abort! (lfs-on !)
   remote: rollback completed (lfs-on !)
   remote: abort: data/inside2/f@f59b4e0218355383d2789196f1092abcf2262b0c: no match found (lfs-on !)
-  abort: stream ended unexpectedly (got 0 bytes, expected 4) (lfs-on !)
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: lfs, narrow
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 503, in unbundle
+      ret = bundle2.getunbundler(self.ui, stream)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3170, in readexactly
+      % (len(s), n)
+  mercurial.error.Abort: stream ended unexpectedly (got 0 bytes, expected 4)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/lfs/wrapper.py", line 432, in push
+      return orig(repo, remote, *args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'

test-pending.t

--- /hgwork/src/tests/test-pending.t
+++ /hgwork/src/tests/test-pending.t.err
@@ -96,7 +96,82 @@
   hook 29b62aeb769fdf78d8d9c5f28b017f76d7ef824b
   transaction abort!
   rollback completed
-  abort: pretxnchangegroup hook failed
+  ** Unknown exception encountered with possibly-broken third-party extension "reject" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "reject" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: reject
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 142, in pythonhook
+      raise error.HookAbort(_(b'%s hook failed') % hname)
+  mercurial.error.HookAbort: pretxnchangegroup hook failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   pull 0000000000000000000000000000000000000000
 
 test external hook
@@ -111,7 +186,80 @@
   hook 29b62aeb769fdf78d8d9c5f28b017f76d7ef824b
   transaction abort!
   rollback completed
-  abort: pretxnchangegroup hook exited with status 1
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 356, in runhooks
+      r = _exthook(ui, repo, htype, hname, cmd, args, throw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 205, in _exthook
+      raise error.HookAbort(_(b'%s hook %s') % (name, desc))
+  mercurial.error.HookAbort: pretxnchangegroup hook exited with status 1
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
   pull 0000000000000000000000000000000000000000
 
 Test that pending on transaction without changegroup see the normal changegroup(

test-pull-network.t

--- /hgwork/src/tests/test-pull-network.t
+++ /hgwork/src/tests/test-pull-network.t.err
@@ -58,18 +58,195 @@
 
   $ hg pull -r 'xxxxxxxxxxxxxxxxxxxy'
   pulling from http://foo@localhost:$HGPORT/
-  abort: unknown revision 'xxxxxxxxxxxxxxxxxxxy'
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 316, in _readbatchresponse
+      result = decode(remoteresult)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 353, in decode
+      self._abort(error.RepoError(data))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 529, in _abort
+      raise exception
+  mercurial.error.RepoError: b"unknown revision 'xxxxxxxxxxxxxxxxxxxy'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 126, in __exit__
+      self.close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 279, in close
+      self._responsef.result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 432, in result
+      return self.__get_result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
+      raise self._exception
+    File "/usr/lib/python3.7/concurrent/futures/thread.py", line 57, in run
+      result = self.fn(*self.args, **self.kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 318, in _readbatchresponse
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg pull -r 'xxxxxxxxxxxxxxxxxx y'
   pulling from http://foo@localhost:$HGPORT/
-  abort: unknown revision 'xxxxxxxxxxxxxxxxxx y'
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 316, in _readbatchresponse
+      result = decode(remoteresult)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 353, in decode
+      self._abort(error.RepoError(data))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 529, in _abort
+      raise exception
+  mercurial.error.RepoError: b"unknown revision 'xxxxxxxxxxxxxxxxxx y'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 126, in __exit__
+      self.close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 279, in close
+      self._responsef.result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 432, in result
+      return self.__get_result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
+      raise self._exception
+    File "/usr/lib/python3.7/concurrent/futures/thread.py", line 57, in run
+      result = self.fn(*self.args, **self.kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 318, in _readbatchresponse
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Test pull of working copy revision
   $ hg pull -r 'ffffffffffff'
   pulling from http://foo@localhost:$HGPORT/
-  abort: unknown revision 'ffffffffffff'
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 316, in _readbatchresponse
+      result = decode(remoteresult)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 353, in decode
+      self._abort(error.RepoError(data))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 529, in _abort
+      raise exception
+  mercurial.error.RepoError: b"unknown revision 'ffffffffffff'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 126, in __exit__
+      self.close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 279, in close
+      self._responsef.result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 432, in result
+      return self.__get_result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
+      raise self._exception
+    File "/usr/lib/python3.7/concurrent/futures/thread.py", line 57, in run
+      result = self.fn(*self.args, **self.kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 318, in _readbatchresponse
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Test 'file:' uri handling:
 

test-pull-r.t

--- /hgwork/src/tests/test-pull-r.t
+++ /hgwork/src/tests/test-pull-r.t.err
@@ -111,8 +111,59 @@
 Pull a missing revision:
 
   $ hg pull -qr missing ../repo
-  abort: unknown revision 'missing'
-  [10]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 395, in lookup
+      return self._repo.lookup(key)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2182, in lookup
+      node = scmutil.revsymbol(self, key).node()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 658, in revsymbol
+      raise error.RepoLookupError(_(b"unknown revision '%s'") % symbol)
+  mercurial.error.RepoLookupError: b"unknown revision 'missing'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Pull multiple revisions with update:
 

test-push-http.t#bundle2

--- /hgwork/src/tests/test-push-http.t
+++ /hgwork/src/tests/test-push-http.t#bundle2.err
@@ -39,9 +39,78 @@
   $ req
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: HTTP Error 403: ssl required
-  % serve errors
-  [100]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 403: ssl required
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  % serve errors
+  [1]
 
 expect authorization error
 
@@ -50,9 +119,85 @@
   $ req
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  % serve errors
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  % serve errors
+  [1]
 
 expect authorization error: must have authorized user
 
@@ -60,9 +205,85 @@
   $ req
   pushing to http://localhost:$HGPORT/
   searching for changes
-  abort: authorization failed
-  % serve errors
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 401: push not authorized
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 282, in sendrequest
+      raise error.Abort(_(b'authorization failed'))
+  mercurial.error.Abort: authorization failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  % serve errors
+  [1]
 
 expect success
 

test-push.t

--- /hgwork/src/tests/test-push.t
+++ /hgwork/src/tests/test-push.t.err
@@ -208,8 +208,75 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: received spurious file revlog entry
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 451, in apply
+      addrevisioncb=on_filelog_rev,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1964, in _addchangegroupfiles
+      raise error.Abort(_(b"received spurious file revlog entry"))
+  mercurial.error.Abort: received spurious file revlog entry
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg -q rollback
   $ mv tmp1 .hg/store/data/beta.i
@@ -243,8 +310,93 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: missing file data for beta:dddc47b3ba30e54484720ce0f4f768a0f4b6efb9 - run hg verify
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/revlog.py", line 790, in rev
+      return self.index.rev(node)
+  mercurial.error.RevlogError: RevlogError
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1973, in _addchangegroupfiles
+      fl.rev(n)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/filelog.py", line 69, in rev
+      return self._revlog.rev(node)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/revlog.py", line 800, in rev
+      raise error.LookupError(node, self.display_id, _(b'no node'))
+  mercurial.error.LookupError: data/beta@dddc47b3ba30e54484720ce0f4f768a0f4b6efb9: no node
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 451, in apply
+      addrevisioncb=on_filelog_rev,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1977, in _addchangegroupfiles
+      % (f, hex(n))
+  mercurial.error.Abort: missing file data for beta:dddc47b3ba30e54484720ce0f4f768a0f4b6efb9 - run hg verify
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ cd ..
 

test-remotefilelog-bundles.t

--- /hgwork/src/tests/test-remotefilelog-bundles.t
+++ /hgwork/src/tests/test-remotefilelog-bundles.t.err
@@ -71,6 +71,106 @@
   $ hg pull -r 66ee28d0328c .hg/strip-backup/66ee28d0328c-b6ee89e7-backup.hg
   pulling from .hg/strip-backup/66ee28d0328c-b6ee89e7-backup.hg
   searching for changes
-  abort: cannot pull from full bundles
-  (use `hg unbundle` instead)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: rebase, remotefilelog, strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/extensions.py", line 532, in closure
+      return func(*(args + a), **kw)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/remotefilelog/__init__.py", line 1082, in localgetbundle
+      source, heads=heads, common=common, bundlecaps=bundlecaps, **kwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 381, in getbundle
+      return bundle2.getunbundler(self.ui, cb)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3166, in readexactly
+      s = stream.read(n)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 2705, in read
+      for chunk in self.iter:
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 2676, in splitbig
+      for chunk in chunks:
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 714, in getchunks
+      self._getcorechunk(), self._compopts
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 736, in _getcorechunk
+      for chunk in part.getchunks(ui=self.ui):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 1197, in getchunks
+      pycompat.raisewithtb(exc, tb)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 294, in raisewithtb
+      raise exc.with_traceback(tb)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 1169, in getchunks
+      for chunk in self._payloadchunks():
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 1213, in _payloadchunks
+      chunk = buff.read(preferedchunksize)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 2705, in read
+      for chunk in self.iter:
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 2676, in splitbig
+      for chunk in chunks:
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 1210, in generate
+      sidedata_helpers=sidedata_helpers,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/remotefilelog/shallowbundle.py", line 85, in generatefiles
+      hint=b"use `hg unbundle` instead",
+  mercurial.error.Abort: cannot pull from full bundles
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/remotefilelog/__init__.py", line 579, in runcommand
+      return orig(lui, repo, *args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/rebase.py", line 2180, in pullrebase
+      ret = orig(ui, repo, *args, **opts)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/remotefilelog/__init__.py", line 1048, in pull
+      result = orig(ui, repo, *pats, **opts)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5463, in pull
+      confirm=opts.get(b'confirm'),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/remotefilelog/__init__.py", line 1090, in exchangepull
+      return orig(repo, remote, *args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1681, in pull
+      _fullpullbundle2(repo, pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1532, in _fullpullbundle2
+      _pullbundle2(pullop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1881, in _pullbundle2
+      bundle = e.callcommand(b'getbundle', args).result()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]

test-share-safe.t

--- /hgwork/src/tests/test-share-safe.t
+++ /hgwork/src/tests/test-share-safe.t.err
@@ -175,8 +175,85 @@
   error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
   transaction abort!
   rollback completed
-  abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "hooklib" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "hooklib" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: extdiff, hooklib, share
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/hooklib/reject_merge_commits.py", line 43, in hook
+      % rev
+  mercurial.error.Abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ hg push ../shared1
   pushing to ../shared1
@@ -187,8 +264,85 @@
   error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
   transaction abort!
   rollback completed
-  abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "hooklib" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "hooklib" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: extdiff, hooklib, share
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/hooklib/reject_merge_commits.py", line 43, in hook
+      % rev
+  mercurial.error.Abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Test that if share source config is untrusted, we dont read it
 
@@ -314,8 +468,85 @@
   error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
   transaction abort!
   rollback completed
-  abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "hooklib" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "hooklib" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: extdiff, hooklib, share
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 116, in pythonhook
+      r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/hgext/hooklib/reject_merge_commits.py", line 43, in hook
+      % rev
+  mercurial.error.Abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg showconfig ui.curses -R ../shared1
   false
 

test-single-head-obsolescence-named-branch-A2.t

--- /hgwork/src/tests/test-single-head-obsolescence-named-branch-A2.t
+++ /hgwork/src/tests/test-single-head-obsolescence-named-branch-A2.t.err
@@ -108,6 +108,66 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: rejecting multiple heads on branch "default"
-  (2 heads: 8aaa48160adc 25c56d33e4c4)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2462, in validate
+      repo, tr2, desc, accountclosed, filtername
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 2186, in enforcesinglehead
+      raise error.Abort(msg, hint=hint)
+  mercurial.error.Abort: rejecting multiple heads on branch "default"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]

test-single-head-obsolescence-named-branch-A5.t

--- /hgwork/src/tests/test-single-head-obsolescence-named-branch-A5.t
+++ /hgwork/src/tests/test-single-head-obsolescence-named-branch-A5.t.err
@@ -103,6 +103,66 @@
   no changes found
   transaction abort!
   rollback completed
-  abort: rejecting multiple heads on branch "default"
-  (2 heads: 8aaa48160adc 74ff5441d343)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: strip
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2462, in validate
+      repo, tr2, desc, accountclosed, filtername
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 2186, in enforcesinglehead
+      raise error.Abort(msg, hint=hint)
+  mercurial.error.Abort: rejecting multiple heads on branch "default"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]

test-single-head.t

--- /hgwork/src/tests/test-single-head.t
+++ /hgwork/src/tests/test-single-head.t.err
@@ -76,9 +76,69 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: rejecting multiple heads on branch "default"
-  (2 heads: 286d02a6e2a2 9bf953aa81f6)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2462, in validate
+      repo, tr2, desc, accountclosed, filtername
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 2186, in enforcesinglehead
+      raise error.Abort(msg, hint=hint)
+  mercurial.error.Abort: rejecting multiple heads on branch "default"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 remerge them
 
@@ -221,9 +281,69 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: rejecting multiple heads on branch "branch_A"
-  (2 heads: 49003e504178 468bd81ccc5d)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2462, in validate
+      repo, tr2, desc, accountclosed, filtername
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 2186, in enforcesinglehead
+      raise error.Abort(msg, hint=hint)
+  mercurial.error.Abort: rejecting multiple heads on branch "branch_A"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 
 closing the head and pushing should succeed
@@ -259,9 +379,69 @@
   adding file changes
   transaction abort!
   rollback completed
-  abort: rejecting multiple heads on branch "branch_A"
-  (3 heads: 49003e504178 5254bcccab93 42b9fe70a3c1)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2711, in unbundle
+      lockandtr[2].close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 38, in _active
+      return func(self, *args, **kwds)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/transaction.py", line 555, in close
+      self._validatecallback[category](self)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2462, in validate
+      repo, tr2, desc, accountclosed, filtername
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 2186, in enforcesinglehead
+      raise error.Abort(msg, hint=hint)
+  mercurial.error.Abort: rejecting multiple heads on branch "branch_A"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 
 Test that config can be overriden as the boolean it is

test-ssh-batch.t

--- /hgwork/src/tests/test-ssh-batch.t
+++ /hgwork/src/tests/test-ssh-batch.t.err
@@ -11,5 +11,64 @@
 
   $ hg pull -r b0 -r nosuchbookmark $(for i in $($TESTDIR/seq.py 1 20); do echo -r b$i; done) ssh://user@dummy/$(pwd)/../a
   pulling from ssh://user@dummy/$TESTTMP/b/../a
-  abort: unknown revision 'nosuchbookmark'
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 316, in _readbatchresponse
+      result = decode(remoteresult)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 353, in decode
+      self._abort(error.RepoError(data))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/sshpeer.py", line 442, in _abort
+      raise exception
+  mercurial.error.RepoError: b"unknown revision 'nosuchbookmark'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5433, in pull
+      fnodes.append(e.callcommand(b'lookup', {b'key': r}))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 126, in __exit__
+      self.close()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 279, in close
+      self._responsef.result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 432, in result
+      return self.__get_result()
+    File "/usr/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
+      raise self._exception
+    File "/usr/lib/python3.7/concurrent/futures/thread.py", line 57, in run
+      result = self.fn(*self.args, **self.kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 318, in _readbatchresponse
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]

test-static-http.t

--- /hgwork/src/tests/test-static-http.t
+++ /hgwork/src/tests/test-static-http.t.err
@@ -94,8 +94,61 @@
 
   $ cd ..
   $ hg clone -r doesnotexist static-http://localhost:$HGPORT/remote local0
-  abort: unknown revision 'doesnotexist'
-  [10]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 395, in lookup
+      return self._repo.lookup(key)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2182, in lookup
+      node = scmutil.revsymbol(self, key).node()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 658, in revsymbol
+      raise error.RepoLookupError(_(b"unknown revision '%s'") % symbol)
+  mercurial.error.RepoLookupError: b"unknown revision 'doesnotexist'"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 1967, in clone
+      depth=opts.get(b'depth') or None,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 923, in clone
+      b'key': rev,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg clone -r 0 static-http://localhost:$HGPORT/remote local0
   adding changesets
   adding manifests

test-subrepo-relative-path.t

--- /hgwork/src/tests/test-subrepo-relative-path.t
+++ /hgwork/src/tests/test-subrepo-relative-path.t.err
@@ -84,8 +84,77 @@
   no changes found
   searching for changes
   no changes found
-  abort: HTTP Error 403: ssl required
-  [100]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 502, in unbundle
+      stream = self._calltwowaystream(b'unbundle', bundle, heads=heads)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 520, in _calltwowaystream
+      return self._callstream(cmd, data=fp_, headers=headers, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 451, in _callstream
+      resp = sendrequest(self.ui, self._urlopener, req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/httppeer.py", line 279, in sendrequest
+      res = opener.open(req)
+    File "/usr/lib/python3.7/urllib/request.py", line 531, in open
+      response = meth(req, response)
+    File "/usr/lib/python3.7/urllib/request.py", line 641, in http_response
+      'http', request, response, code, msg, hdrs)
+    File "/usr/lib/python3.7/urllib/request.py", line 569, in error
+      return self._call_chain(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 503, in _call_chain
+      result = func(*args)
+    File "/usr/lib/python3.7/urllib/request.py", line 649, in http_error_default
+      raise HTTPError(req.full_url, code, msg, hdrs, fp)
+  urllib.error.HTTPError: HTTP Error 403: ssl required
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
 Checking cloned repo ids
 

test-transaction-rollback-on-sigpipe.t

--- /hgwork/src/tests/test-transaction-rollback-on-sigpipe.t
+++ /hgwork/src/tests/test-transaction-rollback-on-sigpipe.t.err
@@ -37,8 +37,65 @@
 (use quiet to avoid flacky output from the server)
 
   $ hg push --quiet --remotecmd "$remotecmd"
-  abort: stream ended unexpectedly (got 0 bytes, expected 4)
-  [255]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 503, in unbundle
+      ret = bundle2.getunbundler(self.ui, stream)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 784, in getunbundler
+      magicstring = changegroup.readexactly(fp, 4)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 3170, in readexactly
+      % (len(s), n)
+  mercurial.error.Abort: stream ended unexpectedly (got 0 bytes, expected 4)
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ cat $SIGPIPE_REMOTE_DEBUG_FILE
   SIGPIPE-HELPER: Starting
   SIGPIPE-HELPER: Redirection in place

test-treediscovery-legacy.t

--- /hgwork/src/tests/test-treediscovery-legacy.t
+++ /hgwork/src/tests/test-treediscovery-legacy.t.err
@@ -122,8 +122,67 @@
   $ cd empty1
   $ hg incoming $remote --rev name1
   comparing with http://localhost:$HGPORT/
-  abort: cannot look up remote changes; remote repository does not support the 'changegroupsubset' capability
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "notcapable-getbundle known changegroupsubset bundle2" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "notcapable-getbundle known changegroupsubset bundle2" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: notcapable-getbundle known changegroupsubset bundle2
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 545, in changegroupsubset
+      self.requirecap(b'changegroupsubset', _(b'look up remote changes'))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/interfaces/repository.py", line 417, in requirecap
+      % (purpose, name)
+  mercurial.error.CapabilityError: b"cannot look up remote changes; remote repository does not support the 'changegroupsubset' capability"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 4368, in incoming
+      return hg.incoming(ui, repo, source, opts)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 1348, in incoming
+      display, subreporecurse, ui, repo, source, opts, subpath=subpath
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 1303, in _incoming
+      ui, repo, other, revs, opts.get(b"bundle"), opts.get(b"force")
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundlerepo.py", line 662, in getremotechanges
+      b'source': b'incoming',
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg incoming $remote
   comparing with http://localhost:$HGPORT/
   0 d57206cc072a: r0 
@@ -311,8 +370,67 @@
   $ hg init partial; cd partial
   $ hg incoming $remote --rev name2
   comparing with http://localhost:$HGPORT/
-  abort: cannot look up remote changes; remote repository does not support the 'changegroupsubset' capability
-  [255]
+  ** Unknown exception encountered with possibly-broken third-party extension "notcapable-getbundle known changegroupsubset bundle2" (version N/A)
+  ** which supports versions unknown of Mercurial.
+  ** Please disable "notcapable-getbundle known changegroupsubset bundle2" and try your action again.
+  ** If that fixes the bug please report it to the extension author.
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: notcapable-getbundle known changegroupsubset bundle2
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 212, in sendcommands
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 545, in changegroupsubset
+      self.requirecap(b'changegroupsubset', _(b'look up remote changes'))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/interfaces/repository.py", line 417, in requirecap
+      % (purpose, name)
+  mercurial.error.CapabilityError: b"cannot look up remote changes; remote repository does not support the 'changegroupsubset' capability"
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 4368, in incoming
+      return hg.incoming(ui, repo, source, opts)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 1348, in incoming
+      display, subreporecurse, ui, repo, source, opts, subpath=subpath
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hg.py", line 1303, in _incoming
+      ui, repo, other, revs, opts.get(b"bundle"), opts.get(b"force")
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundlerepo.py", line 662, in getremotechanges
+      b'source': b'incoming',
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 179, in callcommand
+      self.sendcommands()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/wireprotov1peer.py", line 214, in sendcommands
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
   $ hg pull $remote --rev name2
   pulling from http://localhost:$HGPORT/
   abort: partial pull cannot be done because other repository doesn't support changegroupsubset.

test-util.py

--- /hgwork/src/tests/test-util.py.out
+++ /hgwork/src/tests/test-util.py.err
@@ -0,0 +1,4 @@
+Traceback (most recent call last):
+  File "/hgwork/src/tests/test-util.py", line 53, in <module>
+    _start_default = (util.timedcmstats.start.default, 'factory')
+AttributeError: type object 'timedcmstats' has no attribute 'start'

test-win32text.t

--- /hgwork/src/tests/test-win32text.t
+++ /hgwork/src/tests/test-win32text.t.err
@@ -76,8 +76,81 @@
   ** = cleverdecode:
   transaction abort!
   rollback completed
-  abort: pretxnchangegroup.crlf hook failed
-  [40]
+  ** unknown exception encountered, please report by visiting
+  ** https://mercurial-scm.org/wiki/BugTracker
+  ** Python 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]
+  ** Mercurial Distributed SCM (version 6.1+hg155.88395a6ce362)
+  ** Extensions loaded: 
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 284, in callcommand
+      result = fn(**pycompat.strkwargs(args))
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 410, in unbundle
+      ret = exchange.unbundle(self._repo, bundle, heads, b'push', url)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 2701, in unbundle
+      op = bundle2.processbundle(repo, cg, op=op)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 485, in processbundle
+      processparts(repo, op, unbundler)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 493, in processparts
+      _processpart(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 567, in _processpart
+      handler(op, part)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 2032, in handlechangegroup
+      **extrakwargs
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/bundle2.py", line 497, in _processchangegroup
+      ret = cg.apply(op.repo, tr, source, url, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/changegroup.py", line 509, in apply
+      **pycompat.strkwargs(hookargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 2038, in hook
+      return hook.hook(self.ui, self, name, throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 273, in hook
+      res = runhooks(ui, repo, htype, hooks, throw=throw, **args)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 353, in runhooks
+      ui, repo, htype, hname, hookfn, args, throw
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/hook.py", line 142, in pythonhook
+      raise error.HookAbort(_(b'%s hook failed') % hname)
+  mercurial.error.HookAbort: pretxnchangegroup.crlf hook failed
+  
+  During handling of the above exception, another exception occurred:
+  
+  Traceback (most recent call last):
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/bin/hg", line 60, in <module>
+      dispatch.run()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 143, in run
+      status = dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 232, in dispatch
+      status = _rundispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 276, in _rundispatch
+      ret = _runcatch(req) or 0
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 452, in _runcatch
+      return _callcatch(ui, _runcatchfunc)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 462, in _callcatch
+      return scmutil.callcatch(ui, func)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/scmutil.py", line 152, in callcatch
+      return func()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 442, in _runcatchfunc
+      return _dispatch(req)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1256, in _dispatch
+      lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 900, in runcommand
+      ret = _runcommand(ui, options, cmd, d)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1267, in _runcommand
+      return cmdfunc()
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/dispatch.py", line 1253, in <lambda>
+      d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/util.py", line 1885, in check
+      return func(*args, **kwargs)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/commands.py", line 5792, in push
+      opargs=opargs,
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 474, in push
+      _pushbundle2(pushop)
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/exchange.py", line 1156, in _pushbundle2
+      b'url': pushop.remote.url(),
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/localrepo.py", line 286, in callcommand
+      pycompat.future_set_exception_info(f, sys.exc_info()[1:])
+    File "/hgwork/tmp/hgtests.ucjkj11q/install/lib/python/mercurial/pycompat.py", line 44, in future_set_exception_info
+      f.set_exception_info(exc_info[0])
+  AttributeError: 'Future' object has no attribute 'set_exception_info'
+  [1]
 
   $ mv .hg/hgrc.bak .hg/hgrc
   $ echo hello > f

Skipped Tests

• test-casecollision-merge.t
• test-casefolding.t
• test-check-cargo-lock.t
• test-check-clang-format.t
• test-check-format.t
• test-check-jshint.t
• test-check-py3-compat.t
• test-check-pytype.t
• test-check-rust-format.t
• test-chg.t
• test-convert-baz.t
• test-convert-bzr-114.t
• test-convert-bzr-directories.t
• test-convert-bzr-ghosts.t
• test-convert-bzr-merges.t
• test-convert-bzr-treeroot.t
• test-convert-bzr.t
• test-convert-darcs.t
• test-convert-hg-svn.t
• test-convert-mtn.t
• test-convert-p4-filetypes.t
• test-convert-p4.t
• test-convert-svn-branches.t
• test-convert-svn-encoding.t
• test-convert-svn-move.t
• test-convert-svn-source.t
• test-convert-svn-startrev.t
• test-convert-svn-tags.t
• test-debian-packages.t
• test-docker-packaging.t
• test-fix-clang-format.t
• test-fuzz-targets.t
• test-git-interop.t
• test-lfs-test-server.t#git-server
• test-mac-packages.t
• test-no-symlinks.t
• test-remotefilelog-bundle2-legacy.t
• test-rhg-sparse-narrow.t
• test-rhg.t
• test-sparse-fsmonitor.t
• test-sparse-revlog.t
• test-verify-repo-operations.py

Long Tests

Timeline