Bug 2325452
| Summary: | satyr fails to build with Python 3.14: _pickle.PicklingError: Can't pickle local object <function TestDistances.test_distances_part_parallel.<locals>.do_test.<locals>.compute_part at 0x7f7f845f2560> | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Karolina Surma <ksurma> |
| Component: | satyr | Assignee: | Michal Srb <msrb> |
| Status: | POST --- | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | urgent | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | rawhide | CC: | abrt-sig, ksurma, mhroncok, mmarusak, msrb |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | Bug | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 2322407 | ||
Per https://docs.python.org/dev/whatsnew/3.14.html#multiprocessing: The default start method (see Contexts and start methods) changed from fork to forkserver on platforms other than macOS & Windows where it was already spawn. If you require the threading incompatible fork start method you must explicitly request it using a context from multiprocessing.get_context() (preferred) or change the default via multiprocessing.set_start_method(). (Contributed by Gregory P. Smith in gh-84559.) This bug appears to have been reported against 'rawhide' during the Fedora Linux 42 development cycle. Changing version to 42. This blocks the @critical-path-anaconda group. Let's backport https://github.com/abrt/satyr/pull/343 please. Also @critical-path-base, @kde-desktop, @workstation-product. |
satyr fails to build with Python 3.14.0a1. ERROR: test_distances_part_parallel (__main__.TestDistances.test_distances_part_parallel) ---------------------------------------------------------------------- Traceback (most recent call last): File "/builddir/build/BUILD/satyr-0.43-build/satyr-0.43/tests/testsuite.dir/09/../../python/metrics.py", line 174, in test_distances_part_parallel do_test(self.threads[:2], 1) ~~~~~~~^^^^^^^^^^^^^^^^^^^^^ File "/builddir/build/BUILD/satyr-0.43-build/satyr-0.43/tests/testsuite.dir/09/../../python/metrics.py", line 160, in do_test processes[-1].start() ~~~~~~~~~~~~~~~~~~~^^ File "/usr/lib64/python3.14/multiprocessing/process.py", line 121, in start self._popen = self._Popen(self) ~~~~~~~~~~~^^^^^^ File "/usr/lib64/python3.14/multiprocessing/context.py", line 224, in _Popen return _default_context.get_context().Process._Popen(process_obj) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^ File "/usr/lib64/python3.14/multiprocessing/context.py", line 300, in _Popen return Popen(process_obj) File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 35, in __init__ super().__init__(process_obj) ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^ File "/usr/lib64/python3.14/multiprocessing/popen_fork.py", line 20, in __init__ self._launch(process_obj) ~~~~~~~~~~~~^^^^^^^^^^^^^ File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 47, in _launch reduction.dump(process_obj, buf) ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ File "/usr/lib64/python3.14/multiprocessing/reduction.py", line 60, in dump ForkingPickler(file, protocol).dump(obj) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^ _pickle.PicklingError: Can't pickle local object <function TestDistances.test_distances_part_parallel.<locals>.do_test.<locals>.compute_part at 0x7f7f845f2560> when serializing dict item '_target' when serializing multiprocessing.context.Process state when serializing multiprocessing.context.Process object https://docs.python.org/3.14/whatsnew/3.14.html For the build logs, see: https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08208176-satyr/ For all our attempts to build satyr with Python 3.14, see: https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/satyr/ Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.14: https://copr.fedorainfracloud.org/coprs/g/python/python3.14/ Let us know here if you have any questions. Python 3.14 is planned to be included in Fedora 43. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14. A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon. We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.