⬆️ deps: Update dependency Cython to v3.0.12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Cython (source)	3.0.7 -> 3.0.12

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Release Notes

cython/cython (Cython)

v3.0.12

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===================

Bugs fixed

• Release 3.0.11 introduced some incorrect noexcept warnings.
  (Github issue :issue:6335)

• Conditional assignments to variables using the walrus operator could crash.
  (Github issue :issue:6094)

• Dict assignments to struct members with reserved C names could generate invalid C code.

• Fused ctuples with the same entry types but different sizes could fail to compile.
  (Github issue :issue:6328)

• In Py3, pyximport was not searching sys.path when looking for importable source files.
  (Github issue :issue:5615)

• Using & 0 on integers produced with int.from_bytes() could read invalid memory on Python 3.10.
  (Github issue :issue:6480)

• Modules could fail to compile in PyPy 3.11 due to missing CPython specific header files.
  Patch by Matti Picus. (Github issue :issue:6482)

• Minor fix in C++ partial_sum() declaration.

v3.0.11

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===================

Features added

• The C++11 emplace* methods were added to libcpp.deque.
  Patch by Somin An. (Github issue :issue:6159)

Bugs fixed

• The exception check value of functions declared in pxd files was not always applied in 3.0.10.
  (Github issue :issue:6122)

• A crash on exception deallocations was fixed.
  (Github issue :issue:6022)

• A crash was fixed when assigning a zero-length slice to a memoryview.
  Patch by Michael Man. (Github issue :issue:6227)

• libcpp.optional.value() could crash if it raised a C++ exception.
  Patch by Alexander Condello. (Github issue :issue:6190)

• The return type of str() was mishandled, leading to crashes with language_level=3.
  (Github issue :issue:6166)

• bytes.startswith/endswith() failed for non-bytes substrings (e.g. bytearray).
  (Github issue :issue:6168)

• Fused ctuples crashed Cython.
  (Github issue :issue:6068)

• A compiler crash was fixed when using extension types in fused types.
  (Github issue :issue:6204)

• The module cleanup code was incorrect for globally defined memory view slices.
  (Github issue :issue:6276)

• Some adaptations were made to enable compilation in Python 3.13.
  (Github issues :issue:5997, :issue:6182, :issue:6251)

v3.0.10

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===================

Bugs fixed

• Cython generated incorrect self-casts when directly calling final methods of subtypes.
  Patch by Lisandro Dalcin. (Github issue :issue:2747)

• Internal C names generated from C function signatures could become too long for MSVC.
  (Github issue :issue:6052)

• The noexcept warnings could be misleading in some cases.
  Patch by Gonzalo Tornaría. (Github issue :issue:6087)

• The @cython.ufunc implementation could generate incomplete C code.
  (Github issue :issue:6064)

• The libcpp.complex declarations could result in incorrect C++ code.
  Patch by Raffi Enficiaud. (Github issue :issue:6037)

• Several tests were adapted to work with both NumPy 1.x and 2.0.
  Patch by Matti Picus. (Github issues :issue:6076, :issue:6100)

• C compiler warnings when the freelist implementation is disabled (e.g. on PyPy) were fixed.
  It can now be disabled explicitly with the C macro guard CYTHON_USE_FREELISTS=0.
  (Github issue :issue:6099)

• Some C macro guards for feature flags were missing from the NOGIL Python configuration.

• Some recently added builtins were unconditionally looked up at module import time
  (if used by user code) that weren't available on all Python versions and could thus
  fail the import.

• A performance hint regarding exported pxd declarations was improved.
  (Github issue :issue:6001)

v3.0.9

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==================

Features added

• Assigning const values to non-const variables now issues a warning.
  (Github issue :issue:5639)

• Using noexcept on a function returning Python objects now issues a warning.
  (Github issue :issue:5661)

• Some C-API usage was updated for the upcoming CPython 3.13.
  Patches by Victor Stinner et al. (Github issues :issue:6003, :issue:6020)

• The deprecated Py_UNICODE type is no longer used, unless required by user code.
  (Github issue :issue:5982)

• std::string.replace() declarations were added to libcpp.string.
  Patch by Kieran Geary. (Github issue :issue:6037)

Bugs fixed

• Cython generates incorrect (but harmless) self-casts when directly calling
  final methods of subtypes. Lacking a better solution, the errors that recent
  gcc versions produce have been silenced for the time being.
  Original patch by Michał Górny. (Github issue :issue:2747)

• Unused variable warnings about clineno were fixed when C lines in tracebacks are disabled.
  (Github issue :issue:6035)

• Subclass deallocation of extern classes could crash if the base class uses GC.
  Original patch by Jason Fried. (Github issue :issue:5971)

• Type checks for Python memoryview could use an invalid C function.
  Patch by Xenia Lu. (Github issue :issue:5988)

• Calling final fused functions could generate invalid C code.
  (Github issue :issue:5989)

• Declaring extern enums multiple times could generate invalid C code.
  (Github issue :issue:5905)

• pyximport used relative paths incorrectly.
  Patch by Stefano Rivera. (Github issue :issue:5957)

• Running Cython with globbing characters ([]*?) in the module search path could fail.
  Patch by eewanco. (Github issue :issue:5942)

• Literal strings that include braces could change the C code indentation.

Other changes

• The "enum class not importable" warning is now only issued once per enum type.
  (Github issue :issue:5941)

v3.0.8

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==================

Bugs fixed

• Using const together with defined fused types could fail to compile.
  (Github issue :issue:5230)

• A "use after free" bug was fixed in parallel sections.
  (Github issue :issue:5922)

• Several types were not available as cython.* types in pure Python code.

• The generated code is now correct C89 again, removing some C++ style // comments
  and C99-style declaration-after-code code ordering. This is still relevant for some
  ols C compilers, specifically ones that match old Python 2.7 installations.

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