Sourced from cython's releases.

3.1.6

No release notes provided.

3.1.5 (2025-10-19)

Bugs fixed

• Conversion from C++ strings longer than PY_SSIZE_T_MAX did not validate the length.

• Some non-Limited API code was incorrectly used in generated header files. (Github issue :issue:7157)

• Optimised unpacking of Python integers in expressions uses a slightly safer scheme. (Github issue :issue:7134)

• Empty return statements were not always reported when tracing. (Github issue :issue:7022)

• Value conversion errors when tracing C return statements no longer fail the trace but fall back to reporting None returns instead. (Github issue :issue:6503)

Sourced from cython's changelog.

3.1.6 (2025-10-23)

Bugs fixed

• Unicode characters formatted from C integers with f"{value:c}" could result in invalid Python string objects since Cython 3.1.0. (Github issue :issue:7240)

• cythonize (program and function) now uses concurrent.futures.ProcessPoolExecutor instead of multiprocessing.Pool to fix a hang on build failures in parallel builds. A possible work-around is to disable parallel builds. Patch by Sviatoslav Sydorenko. (Github issue :issue:7183)

3.1.5 (2025-10-20)

Bugs fixed

• Conversion from C++ strings longer than PY_SSIZE_T_MAX did not validate the length.

• Some non-Limited API code was incorrectly used in generated header files. (Github issue :issue:7157)

• Optimised unpacking of Python integers in expressions uses a slightly safer scheme. (Github issue :issue:7134)

• Empty return statements were not always reported when tracing. (Github issue :issue:7022)

• Value conversion errors when tracing C return statements no longer fail the trace but fall back to reporting None returns instead. (Github issue :issue:6503)

• b40c676 Prepare release of 3.1.6.
• 2c00332 Build: Clear "license-files" option in setup metadata due to
• 6d0b9bd Build: Use twine to check the wheels before uploading them.
• fecd0e5 Silence a C coercion warning in a test.
• 2a68bbc Avoid back-and-forth between signed and unsigned index types in C array conve...
• 1824975 Silence a C compiler warning about implicit signed/unsigned conversion.
• a583bc3 Disable parallelism in cythonize command/function on spawn (GH-7183)
• 2ee0bc1 Update changelog.
• b0f7b40 Fix f-string joining when non-ASCII "{intvalue:c}" character formats are invo...
• 67351ba Adapt release date of 3.1.5 to PyPI release time.
• Additional commits viewable in compare view

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