Sourced from cython's changelog.

3.1.4 (2025-09-16)

Features added

• Declarations for the new PyUnstable_*() refcounting C-API functions in Py3.14 were added. (Github issue :issue:6836)

Bugs fixed

• The monitoring code could crash on tracing. (Github issue :issue:7050)

• Initialising the monitoring code could fail with a CPython exception. See nedbat/coveragepy#1790

• Optimised integer shifting triggered undefined behaviour in C. (Github issue :issue:7089)

• Deallocating objects that inherit from external types defined in pxd files could run into an infinite loop. (Github issue :issue:7143)

• A reference to metaclasses could be leaked on instantiation. (Github issue :issue:7130)

• (Unlikely) error handling during empty builtin container tests was ineffective. (Github issue :issue:7190)

• Generated *_api.h files used potentially unknown Cython configuration macros. (Github issue :issue:7108)

• cythonize() avoids parallel compiler runs on systems using spawn() in multiprocessing. Patch by Marcel Bargull. (Github issue :issue:3262)

• The @cython.ufunc decorator was missing in type checker stubs. Patch by jayClean. (Github issue :issue:7109)

• 236e4a3 Build: Update cibuildwheel version to 3.1.4.
• cb2e2a3 Prepare release of 3.1.4.
• 4fdb990 Update changelog.
• fa78291 Remove confusing "optionally" from embedded docs (#7071)
• 2886cd9 Fix error handling in empty container test (GH-7096)
• 8993322 Library: Add declarations for new refcounting C-API functions in Py3.14.
• dc54ef2 Simpify some conditions.
• 41f985e Bump OS X runner version to "macos-latest" (GH-7041)
• dd18f11 Disable parallel cythonization for "spawn" start method. (GH-3263)
• be16c51 Fix a small typo (#7125)
• Additional commits viewable in compare view

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