Bug 2417021 - xapian-bindings fails to build with Python 3.15: Fatal Python error: PyMutex_Unlock: unlocking mutex that is not locked
Summary: xapian-bindings fails to build with Python 3.15: Fatal Python error: PyMutex_...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: xapian-bindings
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Christiano Anderson
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
: 2486008 (view as bug list)
Depends On:
Blocks: PYTHON3.15 F45FTBFS F45FailsToInstall 2485998 2488373
TreeView+ depends on / blocked
 
Reported: 2025-11-25 14:27 UTC by Karolina Surma
Modified: 2026-07-15 20:37 UTC (History)
8 users (show)

Fixed In Version: xapian-bindings-1.4.31-3.fc45
Clone Of:
Environment:
Last Closed: 2026-07-15 20:37:53 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Karolina Surma 2025-11-25 14:27:28 UTC
xapian-bindings fails to build with Python 3.15.0a2.

make[3]: Entering directory '/builddir/build/BUILD/xapian-bindings-1.4.29-build/xapian-bindings-1.4.29/python3'
/usr/bin/python3 -O -c 'import os;os.chdir("xapian");import _xapian'
make[3]: Leaving directory '/builddir/build/BUILD/xapian-bindings-1.4.29-build/xapian-bindings-1.4.29/python3'
Fatal Python error: PyMutex_Unlock: unlocking mutex that is not locked
Python runtime state: finalizing (tstate=0x00007fc067411b18)

make[3]: *** [Makefile:1323: xapian/__pycache__/__init__.cpython-315.opt-1.pyc] Aborted (core dumped)

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_64/09836275-xapian-bindings/

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

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 18:26:08 UTC
*** Bug 2486008 has been marked as a duplicate of this bug. ***

Comment 2 Fedora Fails To Install 2026-06-14 07:11:44 UTC
Hello,

Please note that this comment was generated automatically by https://forge.fedoraproject.org/releng/tooling/src/branch/main/release-process/bug-filing/follow-policy/follow_policy.py
If you feel that this output has mistakes, please open an issue at https://forge.fedoraproject.org/releng/tickets/issues

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 3 Christiano Anderson 2026-06-22 05:58:35 UTC
I'll be checking with the upstream

Comment 4 Karolina Surma 2026-07-01 10:57:42 UTC
xapian-bindings bundle a prebuilt xapian_wrap.cc, built with swig 4.3.0.
In swig 4.4.0+ this change happened: https://github.com/swig/swig/commit/892be2b8024d391dbc78028a2e99b7800db2ea99
A local build of xapian-bindings 1.4.31 succeeds for me when I patch the generated file with the corresponding change.
The proper fix would be to regenerate the file with the newer swig (maybe this could be done during the build with the swig version that's available in the destination Fedora at the moment?). In Rawhide we've got swig 4.4.1.

Comment 5 Denis Arnaud 2026-07-01 16:04:54 UTC
(In reply to Karolina Surma from comment #4)
> xapian-bindings bundle a prebuilt xapian_wrap.cc, built with swig 4.3.0.
> In swig 4.4.0+ this change happened:
> https://github.com/swig/swig/commit/892be2b8024d391dbc78028a2e99b7800db2ea99
> A local build of xapian-bindings 1.4.31 succeeds for me when I patch the
> generated file with the corresponding change.
> The proper fix would be to regenerate the file with the newer swig (maybe
> this could be done during the build with the swig version that's available
> in the destination Fedora at the moment?). In Rawhide we've got swig 4.4.1.

Thanks!

Feel free to contribute to the package directly: https://src.fedoraproject.org/rpms/xapian-bindings
You are now a maintainer of it :)

Comment 6 Karolina Surma 2026-07-03 08:22:31 UTC
Thanks! Let me also add @python-packagers-sig to the list of commiters. I care about this package, because it's in the dependency chain of python-sphinx, but have no direct use to it.

Comment 7 Denis Arnaud 2026-07-03 09:15:23 UTC
(In reply to Karolina Surma from comment #6)
> Thanks! Let me also add @python-packagers-sig to the list of commiters. I
> care about this package, because it's in the dependency chain of
> python-sphinx, but have no direct use to it.

Sure, please do so!

Comment 8 Karolina Surma 2026-07-03 10:40:26 UTC
I submitted https://src.fedoraproject.org/rpms/xapian-bindings/pull-request/10 - but there's an issue with versioning and the untagged 2.0.0 builds. PTAL.

Comment 9 Fedora Update System 2026-07-15 20:33:21 UTC
FEDORA-2026-e08b690082 (xapian-bindings-1.4.31-3.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e08b690082

Comment 10 Fedora Update System 2026-07-15 20:37:53 UTC
FEDORA-2026-e08b690082 (xapian-bindings-1.4.31-3.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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