Bug 2323185 - python-readability-lxml fails to build with Python 3.14: _pickle.PicklingError: Can't pickle <function TestArticleOnly.test_many_repeated_spaces at 0x7ff0ea064460>: it's not the same object as tests.test_article_only.TestArticleOnly.test_many_repeated_spa
Summary: python-readability-lxml fails to build with Python 3.14: _pickle.PicklingErro...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python-readability-lxml
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Artem
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 2372099 (view as bug list)
Depends On:
Blocks: PYTHON3.14 F43FTBFS, RAWHIDEFTBFS F43FailsToInstall, RAWHIDEFailsToInstall
TreeView+ depends on / blocked
 
Reported: 2024-11-01 15:07 UTC by Karolina Surma
Modified: 2025-06-11 16:08 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: Bug
Embargoed:


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System ID Private Priority Status Summary Last Updated
Github python cpython issues 126831 0 None open 3.14.0a1: `_pickle.PicklingError: Can't pickle local object` when a multiprocessing.Process is started with target funct... 2024-11-14 12:48:30 UTC

Description Karolina Surma 2024-11-01 15:07:40 UTC
python-readability-lxml fails to build with Python 3.14.0a1.

=================================== FAILURES ===================================
__________________ TestArticleOnly.test_many_repeated_spaces ___________________
/usr/lib/python3.14/site-packages/timeout_decorator/timeout_decorator.py:91: in new_function
    return timeout_wrapper(*args, **kwargs)
/usr/lib/python3.14/site-packages/timeout_decorator/timeout_decorator.py:146: in __call__
    self.__process.start()
/usr/lib64/python3.14/multiprocessing/process.py:121: in start
    self._popen = self._Popen(self)
/usr/lib64/python3.14/multiprocessing/context.py:224: in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
/usr/lib64/python3.14/multiprocessing/context.py:300: in _Popen
    return Popen(process_obj)
/usr/lib64/python3.14/multiprocessing/popen_forkserver.py:35: in __init__
    super().__init__(process_obj)
/usr/lib64/python3.14/multiprocessing/popen_fork.py:20: in __init__
    self._launch(process_obj)
/usr/lib64/python3.14/multiprocessing/popen_forkserver.py:47: in _launch
    reduction.dump(process_obj, buf)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

obj = <Process name='Process-2' parent=316 initial daemon>
file = <_io.BytesIO object at 0x7ff0ea097560>, protocol = None

    def dump(obj, file, protocol=None):
        '''Replacement for pickle.dump() using ForkingPickler.'''
>       ForkingPickler(file, protocol).dump(obj)
E       _pickle.PicklingError: Can't pickle <function TestArticleOnly.test_many_repeated_spaces at 0x7ff0ea064460>: it's not the same object as tests.test_article_only.TestArticleOnly.test_many_repeated_spaces
E       when serializing tuple item 1
E       when serializing dict item '_args'
E       when serializing multiprocessing.context.Process state
E       when serializing multiprocessing.context.Process object

/usr/lib64/python3.14/multiprocessing/reduction.py:60: PicklingError

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_64/08189223-python-readability-lxml/

For all our attempts to build python-readability-lxml with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-readability-lxml/

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.

Comment 1 Karolina Surma 2024-11-18 09:19:27 UTC
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.)

Comment 2 Aoife Moloney 2025-02-26 13:14:29 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 42 development cycle.
Changing version to 42.

Comment 3 Karolina Surma 2025-06-11 16:03:47 UTC
*** Bug 2372099 has been marked as a duplicate of this bug. ***


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