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Segmentation fault on Python 3.14 rc1 on macOS #137617
Description
Activity
Are you able to create a minimal code example to reproduce this?
Tips here:
Confirmed it has the same bad commit.
Built with
-enable-experimental-jit=yes-off --with-lto=full --enable-optimizationsfrom a5274cd and:git clone https://github.com/MatthieuDartiailh/pyclibrary.git cd pyclibrary python3.14 -m venv venv source venv/bin/activate python -m pip install . pytest-cov pytest python -m pytest tests --cov pyclibrary --cov-report xml -v tests/backends/test_ctypes.py::TestCTypesCLibrary::test_call
Causes
Abort trap: 6@inventshah are you able to minimise the crash-causing-code? Ideally without using pytest, and even better if only using stdlib modules.
A
@inventshah provided a minimal reproducer in #137573 (comment)
Reacted by Hugo van Kemenade
Bug report
Bug description:
Running the pyclibrary testsuite on Python 3.14-rc1 segfaults on macOS (while it succeeds on Linux and Windows).
The CI job that displayed the issue is https://github.com/MatthieuDartiailh/pyclibrary/actions/runs/16865688466/job/47772236565?pr=83
CPython versions tested on:
3.14
Operating systems tested on:
macOS