Bug 2328711 - qtile fails to build with Python 3.14: _pickle.PicklingError: Can't pickle local object <function TestManager.start.<locals>.run_qtile at 0x7f9c5918fed0>
Summary: qtile fails to build with Python 3.14: _pickle.PicklingError: Can't pickle lo...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: qtile
Version: 43
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Jakub Kadlčík
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 2372209 2391433 (view as bug list)
Depends On:
Blocks: PYTHON3.14 F43FTBFS F43FailsToInstall 2372210
TreeView+ depends on / blocked
 
Reported: 2024-11-25 16:36 UTC by Karolina Surma
Modified: 2025-09-12 19:23 UTC (History)
6 users (show)

Fixed In Version: qtile-0.33.0-1.20250828git26bd747.fc43
Clone Of:
Environment:
Last Closed: 2025-09-12 19:23:45 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Karolina Surma 2024-11-25 16:36:14 UTC
qtile fails to build with Python 3.14.0a2.

= 489 failed, 430 passed, 68 skipped, 1 deselected, 8 xfailed, 35 warnings, 2642 errors in 151.99s (0:02:31) =

Example failures:
ERROR test/test_manager.py::test_unmap_noscreen[x11-2-ManagerConfig] - AttributeError: 'NoneType' object has no attribute 'terminate'
ERROR test/test_manager.py::test_unmap_noscreen[wayland-2-BareConfig] - _pickle.PicklingError: Can't pickle local object <function TestManager.start.<locals>.run_qtile at 0x7f9c57415430>
when serializing dict item '_target'
when serializing multiprocessing.context.Process state
when serializing multiprocessing.context.Process object
ERROR test/test_manager.py::test_unmap_noscreen[wayland-2-BareConfig] - AttributeError: 'NoneType' object has no attribute 'terminate'
ERROR test/test_manager.py::test_unmap_noscreen[wayland-2-ManagerConfig] - _pickle.PicklingError: Can't pickle local object <function TestManager.start.<locals>.run_qtile at 0x7f9c57624f60>
when serializing dict item '_target'
when serializing multiprocessing.context.Process state
when serializing multiprocessing.context.Process object
ERROR test/test_manager.py::test_unmap_noscreen[wayland-2-ManagerConfig] - AttributeError: 'NoneType' object has no attribute 'terminate'

According to 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.)


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_64/08301832-qtile/

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

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 Aoife Moloney 2025-02-26 13:18:11 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 42 development cycle.
Changing version to 42.

Comment 2 Karolina Surma 2025-06-11 16:06:11 UTC
*** Bug 2372209 has been marked as a duplicate of this bug. ***

Comment 3 Fedora Fails To Install 2025-06-20 19:50:35 UTC
Hello,

Please note that this comment was generated automatically by https://pagure.io/releng/blob/main/f/scripts/ftbfs-fti/follow-policy.py
If you feel that this output has mistakes, please open an issue at https://pagure.io/releng/

This package fails to install and maintainers are advised to take one of the following actions:

 - Fix this bug and close this bugzilla once the update makes it to the repository.
   (The same script that posted this comment will eventually close this bugzilla
   when the fixed package reaches the repository, so you don't have to worry about it.)

or

 - Move this bug to ASSIGNED if you plan on fixing this, but simply haven't done so yet.

or

 - Orphan the package if you no longer plan to maintain it.


If you do not take one of these actions, the process at https://docs.fedoraproject.org/en-US/fesco/Fails_to_build_from_source_Fails_to_install/#_package_removal_for_long_standing_ftbfs_and_fti_bugs will continue.
This package may be orphaned in 7+ weeks.
This is the first reminder (step 3) from the policy.

Don't hesitate to ask for help on https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/ if you are unsure how to fix this bug.

Comment 4 Fedora Fails To Install 2025-07-15 08:33:48 UTC
Hello,

Please note that this comment was generated automatically by https://pagure.io/releng/blob/main/f/scripts/ftbfs-fti/follow-policy.py
If you feel that this output has mistakes, please open an issue at https://pagure.io/releng/

This package fails to install and maintainers are advised to take one of the following actions:

 - Fix this bug and close this bugzilla once the update makes it to the repository.
   (The same script that posted this comment will eventually close this bugzilla
   when the fixed package reaches the repository, so you don't have to worry about it.)

or

 - Move this bug to ASSIGNED if you plan on fixing this, but simply haven't done so yet.

or

 - Orphan the package if you no longer plan to maintain it.


If you do not take one of these actions, the process at https://docs.fedoraproject.org/en-US/fesco/Fails_to_build_from_source_Fails_to_install/#_package_removal_for_long_standing_ftbfs_and_fti_bugs will continue.
This package may be orphaned in 4+ weeks.
This is the second reminder (step 4) from the policy.

Don't hesitate to ask for help on https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/ if you are unsure how to fix this bug.

Comment 5 Fedora Fails To Install 2025-08-12 12:18:18 UTC
This package has been orphaned.

You can pick it up at https://src.fedoraproject.org/rpms/qtile by clicking button "Take". If nobody picks it up, it will be retired and removed from a distribution.

Comment 6 Fedora Admin user for bugzilla script actions 2025-08-12 13:33:50 UTC
This package has changed maintainer in Fedora. Reassigning to the new maintainer of this component.

Comment 7 Miro Hrončok 2025-08-19 09:58:48 UTC
Automation has figured out the package is retired in rawhide.

If you like it to be unretired, please open a ticket at https://pagure.io/releng/new_issue?template=package_unretirement

Comment 8 Miro Hrončok 2025-08-28 10:26:49 UTC
*** Bug 2391433 has been marked as a duplicate of this bug. ***

Comment 9 Fedora Fails To Install 2025-08-29 10:48:22 UTC
Hello,

Please note that this comment was generated automatically by https://pagure.io/releng/blob/main/f/scripts/ftbfs-fti/follow-policy.py
If you feel that this output has mistakes, please open an issue at https://pagure.io/releng/

All subpackages of a package against which this bug was filled are now installable or removed from Fedora 43.

Thanks for taking care of it!

Comment 10 Fedora Update System 2025-08-29 11:12:30 UTC
FEDORA-2025-90251673c4 (qtile-0.33.0-1.20250828git26bd747.fc43 and qtile-extras-0.33.0-1.20250829git7a54fbf.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-90251673c4

Comment 11 Fedora Update System 2025-08-30 01:10:59 UTC
FEDORA-2025-90251673c4 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-90251673c4`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-90251673c4

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 12 Fedora Update System 2025-09-12 19:23:45 UTC
FEDORA-2025-90251673c4 (qtile-0.33.0-1.20250828git26bd747.fc43 and qtile-extras-0.33.0-1.20250829git7a54fbf.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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