Sourced from cython's changelog.

3.1.3 (2025-??-??)

Bugs fixed

• Some method calls with 0 or 1 argument failed to use PyObject_VectorCallMethod().

• cython.pythread_type_lock (also used as fallback for cython.pymutex) could stall on heavily contended locks. (Github issue :issue:6999)

• C string arrays (not pointers) always coerced to the Python default string type, even on explicit casts to other string types. (Github issue :issue:7020)

• An internal C function was not marked as static and leaked a linker symbol. (Github issue :issue:6957)

• Compatibility with PyPy3.8 was lost by accident.

• The Linux binary wheels of 3.1.2 used SSSE3 CPU instructions which are not available on some CPUs. (Github issue :issue:7038)

• 8a1b3c1 Build: Explicitly exclude GraalPython and Freethreaded Python wheels because ...
• c1a622f Update changelog.
• 68ff5dc Fix code-generation with walrus+literals (GH-6989)
• 85aeae1 Fix bug with tokenizing apparent named character literals in raw string (#7057)
• 308c3f9 Build: Exclude freethreading Python wheels in 3.1.x because we currently use ...
• 0edc673 Build: Fix matrix generation.
• f95a8ba Build: Use latest cibuildwheel to include Py3.14.
• 968aecf Prepare release of 3.1.3.
• 9cee731 Update changelog.
• d4cb2fd Build: Do not require wheel for building (GH-7084)
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