https://bz.mercurial-scm.org/show_bug.cgi?id=6632
Bug ID: 6632
Summary: test-copies-chain-merge.t fails with a pickle
exception on Nix on Darwin
Product: Mercurial
Version: stable branch
Hardware: Macintosh
OS: Mac OS
Status: UNCONFIRMED
Severity: bug
Priority: wish
Component: Mercurial
Assignee: bugzi...@mercurial-scm.org
Reporter: kwalkq.mercurial-bugzi...@pacien.net
CC: mercurial-devel@mercurial-scm.org
Python Version: ---
Observed on the NixOS CI with Mercurial 6.0.1 running on Python 3.9.9.
This is happening only with aarch64-darwin, not with other architectures.
```diff
---
/private/tmp/nix-build-mercurial-6.0.1.drv-0/mercurial-6.0.1/tests/test-copies-chain-merge.t
+++
/private/tmp/nix-build-mercurial-6.0.1.drv-0/mercurial-6.0.1/tests/test-copies-chain-merge.t#upgraded-parallel.err
@@ -1717,6 +1717,66 @@
- changelog
- manifest
+ ** unknown exception encountered, please report by visiting
+ ** https://mercurial-scm.org/wiki/BugTracker
+ ** Python 3.9.9 (main, Dec 20 2021, 03:05:17) [Clang 11.1.0 ]
+ ** Mercurial Distributed SCM (version 6.0.1)
+ ** Extensions loaded:
+ Traceback (most recent call last):
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/bin/hg",
line 61, in <module>
+ dispatch.run()
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 144, in run
+ status = dispatch(req)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 250, in dispatch
+ status = _rundispatch(req)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 294, in _rundispatch
+ ret = _runcatch(req) or 0
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 470, in _runcatch
+ return _callcatch(ui, _runcatchfunc)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 480, in _callcatch
+ return scmutil.callcatch(ui, func)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/scmutil.py",
line 153, in callcatch
+ return func()
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 460, in _runcatchfunc
+ return _dispatch(req)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 1273, in _dispatch
+ return runcommand(
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 918, in runcommand
+ ret = _runcommand(ui, options, cmd, d)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 1285, in _runcommand
+ return cmdfunc()
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/dispatch.py",
line 1271, in <lambda>
+ d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/util.py",
line 1888, in check
+ return func(*args, **kwargs)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/debugcommands.py",
line 4195, in debugupgraderepo
+ return upgrade.upgraderepo(
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/upgrade.py",
line 216, in upgraderepo
+ backuppath = upgrade_engine.upgrade(
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/upgrade_utils/engine.py",
line 541, in upgrade
+ _clonerevlogs(
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/upgrade_utils/engine.py",
line 278, in _clonerevlogs
+ sidedata_helpers = get_sidedata_helpers(srcrepo, dstrepo)
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/upgrade_utils/engine.py",
line 45, in get_sidedata_helpers
+ metadata._get_worker_sidedata_adder(srcrepo, dstrepo),
+ File
"/private/tmp/nix-build-mercurial-6.0.1.drv-0/hgtests.l_sml07g/install/lib/python/mercurial/metadata.py",
line 884, in _get_worker_sidedata_adder
+ w.start()
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/process.py",
line 121, in start
+ self._popen = self._Popen(self)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/context.py",
line 224, in _Popen
+ return _default_context.get_context().Process._Popen(process_obj)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/context.py",
line 284, in _Popen
+ return Popen(process_obj)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/popen_spawn_posix.py",
line 32, in __init__
+ super().__init__(process_obj)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/popen_fork.py",
line 19, in __init__
+ self._launch(process_obj)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/popen_spawn_posix.py",
line 47, in _launch
+ reduction.dump(process_obj, fp)
+ File
"/nix/store/ihkkbk8pdimwynkrw267l741q4a55syk-python3-3.9.9/lib/python3.9/multiprocessing/reduction.py",
line 60, in dump
+ ForkingPickler(file, protocol).dump(obj)
+ _pickle.PicklingError: Can't pickle <class
'mercurial.localrepo.derivedrepo:$TESTTMP/repo-chain<dotencode,fncache,generaldelta,revlog-compression-zstd,revlogv1,sparserevlog,store>'>:
attribute lookup
derivedrepo:$TESTTMP/repo-chain<dotencode,fncache,generaldelta,revlog-compression-zstd,revlogv1,sparserevlog,store>
on mercurial.localrepo failed
+ [1]
```
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