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[3.14] Parser stack overflow on musllinux x86_64 #137231
Description
Bug report
Bug description:
When trying to build and test wheels for yt on 3.14.0rc1, we encounter a single error, only on the musllinux image from cibuildwheel, which crashes on import with
MemoryError: Parser stack overflowed - Python source too complex to parseexample logs:
https://github.com/yt-project/yt/actions/runs/16576917774/job/46883376625?pr=5185
To make things worse, this seems to only happen in the context of a pytest session: python -c "import yt" completes without raising.
A minimal reproducer would necessarily still include a significant amount of complexity, so before I try to reduce it, I'd like to ask:
is it expected that the threshold for triggering this exception may depend on the platform and/or the exact Python version ? is it expected that the threshold may be lower in Python 3.14 than it was in 3.13 ?
CPython versions tested on:
3.14
Operating systems tested on:
Linux
Activity
StanFromIreland commentedon Jul 30, 2025
This may mean this is an issue with
pytest, it is difficult to deduce without a specific minimal reproducer.kumaraditya303 commentedon Jul 30, 2025
This seems the same issue as #131338, can you check if the fix at #137175 fixes this?
neutrinoceros commentedon Jul 30, 2025
Thanks for pointing this out !
it might take some time before I can confirm the fix works for us, but it looks very promising. I'll do my best to actually run the check before 3.14.0rc2 . Does anyone mind if we keep this issue open until then ?
kumaraditya303 commentedon Jul 30, 2025
The fix is currently scheduled for inclusion in 3.14.0 but RM can include it in 3.14.rc2 as it affects yt and scipy on 3.14, leaving it for @hugovk to decide.
neutrinoceros commentedon Jul 31, 2025
I've been trying to reproduce the crash with
docker(using the same imagecibuildwheelruns), but so far I haven't been sucessful: the test session completes without error, so I'm not yet ready to try out the patch, as I except no difference. I'll try to think of a more faithful approach if I can.AA-Turner commentedon Jul 31, 2025
Adding the label so that we remember to consider this before 3.14.0 candidate 2.
A
[-][3.14] (Regression ?) Parser stack overflow on `musllinux` `x86_64`[/-][+][3.14] Parser stack overflow on `musllinux` `x86_64`[/+]hugovk commentedon Aug 13, 2025
#137175 has been merged and will be in rc2 (tomorrow). Also musllinux is unsupported per PEP 11 so this doesn't need to block the release.
neutrinoceros commentedon Aug 13, 2025
Thanks for the update ! I'll be testing with the early rc2 as soon as possible and report back here !
mayeut commentedon Aug 15, 2025
it seems that it fixed #133801
neutrinoceros commentedon Aug 16, 2025
I can confirm this is fixed in 3.14.0rc2
Thanks everyone, and godspeed for the release !