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BC Incompatible change in internal string representation (encountered with Rust bindings) (?) · Issue #128972 · python/cpython · GitHub
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Incompatible change in internal string representation (encountered with Rust bindings) (?) #128972

@clin1234

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@clin1234

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.

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