Bug 2440567 - petsc fails to build with Python 3.15: AssertionError: 2 != 3; self.assertEqual(getrefcount(context), 3)
Summary: petsc fails to build with Python 3.15: AssertionError: 2 != 3; self.assertEqu...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: petsc
Version: 45
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Antonio T. sagitter
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 2485730 (view as bug list)
Depends On:
Blocks: PYTHON3.15
TreeView+ depends on / blocked
 
Reported: 2026-02-18 11:32 UTC by Karolina Surma
Modified: 2026-09-21 00:15 UTC (History)
4 users (show)

Fixed In Version: petsc-3.25.2-2.fc45 petsc-3.25.5-3.fc45
Clone Of:
Environment:
Last Closed: 2026-09-21 00:15:30 UTC
Type: Bug
Embargoed:


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System ID Private Priority Status Summary Last Updated
Gitlab petsc/petsc/-/work_items/1902 0 None None None 2026-06-10 19:17:52 UTC

Description Karolina Surma 2026-02-18 11:32:20 UTC
petsc fails to build with Python 3.15.0a6.

Multiple test errors with the same issue:

FAIL: testBasic (test_mat_py.TestDiagonal.testBasic)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/petsc-3.24.4-build/petsc-3.24.4/buildopenmpi_dir/src/binding/petsc4py/test/test_mat_py.py", line 561, in setUp
    super().setUp()
    ~~~~~~~~~~~~~^^
  File "/builddir/build/BUILD/petsc-3.24.4-build/petsc-3.24.4/buildopenmpi_dir/src/binding/petsc4py/test/test_mat_py.py", line 325, in setUp
    self.assertEqual(getrefcount(context), 3)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 2 != 3

https://docs.python.org/3.15/whatsnew/3.15.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.15/fedora-rawhide-x86_64/10144431-petsc/

For all our attempts to build petsc with Python 3.15, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/package/petsc/

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 3.15:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/

Let us know here if you have any questions.

Python 3.15 is planned to be included in Fedora 45.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.15.
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 2026-06-06 18:20:34 UTC
*** Bug 2485730 has been marked as a duplicate of this bug. ***

Comment 2 Fedora Update System 2026-06-10 20:56:35 UTC
FEDORA-2026-d8d6577b53 (petsc-3.25.2-2.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d8d6577b53

Comment 3 Fedora Update System 2026-06-10 22:04:14 UTC
FEDORA-2026-d8d6577b53 (petsc-3.25.2-2.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 4 Aoife Moloney 2026-08-17 14:13:12 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 5 Fedora Update System 2026-09-10 17:31:34 UTC
FEDORA-2026-ffd7711127 (petsc-3.25.5-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ffd7711127

Comment 6 Fedora Update System 2026-09-11 01:35:47 UTC
FEDORA-2026-ffd7711127 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-ffd7711127`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ffd7711127

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

Comment 7 Fedora Update System 2026-09-11 19:27:38 UTC
FEDORA-2026-4a62fe23c1 (petsc-3.25.5-2.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-4a62fe23c1

Comment 8 Fedora Update System 2026-09-12 01:44:20 UTC
FEDORA-2026-4a62fe23c1 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-4a62fe23c1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-4a62fe23c1

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

Comment 9 Fedora Update System 2026-09-12 14:37:22 UTC
FEDORA-2026-0ecb7c676f (petsc-3.25.5-3.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-0ecb7c676f

Comment 10 Fedora Update System 2026-09-13 18:46:29 UTC
FEDORA-2026-0ecb7c676f has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0ecb7c676f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0ecb7c676f

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

Comment 11 Fedora Update System 2026-09-21 00:15:30 UTC
FEDORA-2026-0ecb7c676f (petsc-3.25.5-3.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.


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