Not sure if it's the right place to ask, but here it is.

I'm attempting to introduce 3.14 support in pyo3 (PyO3/pyo3#4811). I've encountered test failures involving UCS and refcounts targeting Windows and Linux. Invoking cargo test --no-default-features --lib --tests, one example of failure is here: https://github.com/clin1234/pyo3/actions/runs/12834317749/job/35791414368. The Python version used for testing 3.14 is 3.14.0a4.

However, running the same command with Python 3.14.0a3 running on Fedora Rawhide locally, I have encountered no test failures whatsoever.

And yes, I have pinged @davidhewitt on this matter.

Linked PRs

• gh-128972: Add _Py_ALIGN_AS and revert PyASCIIObject memory layout. #133085