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chore(deps): update dependency cython to v0.29.37#19

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chore(deps): update dependency cython to v0.29.37#19
renovate[bot] wants to merge 1 commit intomasterfrom
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@renovate renovate bot commented Jan 9, 2026

This PR contains the following updates:

Package Change Age Confidence
cython (source) ==0.29.15 → ==0.29.37 age confidence

Release Notes

cython/cython (cython)

v0.29.37

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

Bugs fixed

  • Fix a potential crash while cleaning up subtypes of externally imported extension
    types when terminating Python. This was introduced in Cython 0.29.35.

  • Fix a complex related compile error on Windows.
    (Github issue :issue:5512)

  • Compiling fused types used in pxd files could crash Cython in Python 3.11+.
    (Github issues :issue:5894, :issue:5588)

  • cythonize failed to consider the CYTHON_FORCE_REGEN env variable.
    Patch by Harmen Stoppels. (Github issue :issue:5712)

.. _0.29.36:

v0.29.36

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

Bugs fixed

  • Async generators lost their return value in PyPy.
    (Github issue :issue:5465)

  • The outdated C macro _PyGC_FINALIZED() is no longer used in Py3.9+.

  • The deprecated Py_OptimizeFlag is no longer used in Python 3.9+.
    (Github issue :issue:5343)

  • Using the global __debug__ variable but not assertions could lead to compile errors.

  • The broken HTML template support was removed from Tempita.
    (Github issue :issue:3309)

.. _0.29.35:

v0.29.35

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

Bugs fixed

  • A garbage collection enabled subtype of a non-GC extension type could call into the
    deallocation function of the super type with GC tracking enabled. This could lead
    to crashes during deallocation if GC was triggered on the type at the same time.
    (Github issue :issue:5432)

  • Some C compile failures and crashes in CPython 3.12 were resolved.

  • except + nogil was syntactically not allowed.
    except +nogil (i.e. defining a C++ exception handling function called nogil)
    is now disallowed to prevent typos.
    (Github issue :issue:5430)

  • A C compile failure in PyPy 3.10 was resolved.
    Patch by Matti Picus. (Github issue :issue:5408)

  • Cython modules now use PEP-489 multi-phase init by default in PyPy 3.9 and later.
    Original patch by Matti Picus. (Github issue :issue:5413)

  • API header files generated by different Cython versions can now be included in the
    same C file.
    (Github issue :issue:5383)

  • Function signatures containing a type like tuple[()] could not be printed.
    Patch by Lisandro Dalcin. (Github issue :issue:5355)

.. _0.29.34:

v0.29.34

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

Bugs fixed

  • A reference leak of the for-loop list/tuple iterable was resolved if the for-loop's
    else: branch executes a break for an outer loop.
    (Github issue :issue:5347)

  • Some C compile failures in CPython 3.12 were resolved.

  • Some old usages of the deprecated Python imp module were replaced with importlib.
    Patch by Matúš Valo. (Github issue :issue:5300)

  • Some issues with depfile generation were resolved.
    Patches by Eli Schwartz. (Github issues :issue:5279, :issue:5291)

.. _0.29.33:

v0.29.33

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

Features added

  • The cythonize and cython commands have a new option -M / --depfile
    to generate .dep dependency files for the compilation unit. This can be used
    by external build tools to track these dependencies.
    The cythonize option was already available in Cython :ref:0.29.27.
    Patches by Evgeni Burovski and Eli Schwartz. (Github issue :issue:1214)

Bugs fixed

  • const fused types could not be used with memory views.
    Patch by Thomas Vincent. (Github issue :issue:1772)

  • wstr usage was removed in Python 3.12 and later (PEP-623).
    (Github issue :issue:5145)

  • A type check assertion for Cython functions failed in debug Python builds.
    (Github issue :issue:5031)

  • Fixed various compiler warnings.
    Patches by Lisandro Dalcin et al. (Github issues :issue:4948, :issue:5086)

  • Fixed error when calculating complex powers of negative numbers.
    (Github issue :issue:5014)

  • Corrected a small mis-formatting of exception messages on Python 2.
    (Github issue :issue:5018)

  • The PyUnicode_AsUTF8AndSize() C-API function was missing from the CPython declarations.
    (Github issue :issue:5163)

  • A performance problem in the compiler was resolved when nesting conditional expressions.
    (Github issue :issue:5197)

  • Test suite problems with recent NumPy and CPython versions were resolved.
    (Github issues :issue:5183, :issue:5190)

Other changes

  • The undocumented, untested and apparently useless syntax
    from somemodule cimport class/struct/union somename was deprecated
    in anticipation of its removal in Cython 3. The type
    modifier is not needed here and a plain cimport of the name will do.
    (Github issue :issue:4905)

  • Properly disable generation of descriptor docstrings on PyPy since they cause crashes.
    It was previously disabled, but only accidentally via a typo.
    Patch by Matti Picus. (Github issue :issue:5083)

  • The cpow directive of Cython 3.0 is available as a no-op.
    (Github issue :issue:5016)

.. _0.29.32:

v0.29.32

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

Bugs fixed

  • Revert "Using memoryview typed arguments in inner functions is now rejected as unsupported."
    Patch by David Woods. (Github issue :issue:4798)

  • from module import * failed in 0.29.31 when using memoryviews.
    Patch by David Woods. (Github issue :issue:4927)

.. _0.29.31:

v0.29.31

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

Features added

  • A new argument --module-name was added to the cython command to
    provide the (one) exact target module name from the command line.
    Patch by Matthew Brett and h-vetinari. (Github issue :issue:4906)

  • A new keyword noexcept was added for forward compatibility with Cython 3.
    Patch by David Woods. (Github issue :issue:4903)

Bugs fixed

  • Use importlib.util.find_spec() instead of the deprecated importlib.find_loader()
    function when setting up the package path at import-time.
    Patch by Matti Picus. (Github issue :issue:4764)

  • Require the C compiler to support the two-arg form of va_start
    on Python 3.10 and higher.
    Patch by Thomas Caswell. (Github issue :issue:4820)

  • Make fused_type subscriptable in Shadow.py.
    Patch by Pfebrer. (Github issue :issue:4842)

  • Fix the incorrect code generation of the target type in bytearray loops.
    Patch by Kenrick Everett. (Github issue :issue:4108)

  • Atomic refcounts for memoryviews were not used on some GCC versions by accident.
    Patch by Sam Gross. (Github issue :issue:4915)

  • Silence some GCC -Wconversion warnings in C utility code.
    Patch by Lisandro Dalcin. (Github issue :issue:4854)

  • Tuple multiplication was ignored in expressions such as [*(1,) * 2].
    Patch by David Woods. (Github issue :issue:4864)

  • Calling append methods on extension types could fail to find the method
    in some cases.
    Patch by David Woods. (Github issue :issue:4828)

  • Ensure that object buffers (e.g. ndarray[object, ndim=1]) containing
    NULL pointers are safe to use, returning None instead of the NULL
    pointer.
    Patch by Sebastian Berg. (Github issue :issue:4859)

  • Using memoryview typed arguments in inner functions is now rejected as unsupported.
    Patch by David Woods. (Github issue :issue:4798)

  • Compilation could fail on systems (e.g. FIPS) that block MD5 checksums at runtime.
    (Github issue :issue:4909)

  • Experimental adaptations for the CPython "nogil" fork was added.
    Note that there is no official support for this in Cython 0.x.
    Patch by Sam Gross. (Github issue :issue:4912)

.. _0.29.30:

v0.29.30

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

Bugs fixed

  • The GIL handling changes in 0.29.29 introduced a regression where
    objects could be deallocated without holding the GIL.
    (Github issue :issue:4796)

.. _0.29.29:

v0.29.29

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

Features added

  • Avoid acquiring the GIL at the end of nogil functions.
    This change was backported in order to avoid generating wrong C code
    that would trigger C compiler warnings with tracing support enabled.
    Backport by Oleksandr Pavlyk. (Github issue :issue:4637)

Bugs fixed

  • Function definitions in finally: clauses were not correctly generated.
    Patch by David Woods. (Github issue :issue:4651)

  • A case where C-API functions could be called with a live exception set was fixed.
    Patch by Jakub Kulík. (Github issue :issue:4722)

  • Pickles can now be exchanged again with those generated from Cython 3.0 modules.
    (Github issue :issue:4680)

  • Cython now correctly generates Python methods for both the provided regular and
    reversed special numeric methods of extension types.
    Patch by David Woods. (Github issue :issue:4750)

  • Calling unbound extension type methods without arguments could raise an
    IndexError instead of a TypeError.
    Patch by David Woods. (Github issue :issue:4779)

  • Calling unbound .__contains__() super class methods on some builtin base
    types could trigger an infinite recursion.
    Patch by David Woods. (Github issue :issue:4785)

  • The C union type in pure Python mode mishandled some field names.
    Patch by Jordan Brière. (Github issue :issue:4727)

  • Allow users to overwrite the C macro _USE_MATH_DEFINES.
    Patch by Yuriy Chernyshov. (Github issue :issue:4690)

  • Improved compatibility with CPython 3.10/11.
    Patches by Thomas Caswell, David Woods.
    (Github issues :issue:4609, :issue:4667, :issue:4721, :issue:4730, :issue:4777)

  • Docstrings of descriptors are now provided in PyPy 7.3.9.
    Patch by Matti Picus. (Github issue :issue:4701)

.. _0.29.28:

v0.29.28

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

Bugs fixed

  • Due to backwards incompatible changes in CPython 3.11a4, the feature flags
    CYTHON_FAST_THREAD_STATE and CYTHON_USE_EXC_INFO_STACK are now disabled
    in Python 3.11 and later. They are enabled again in Cython 3.0.
    Patch by David Woods. (Github issue :issue:4610)

  • A C compiler warning in older PyPy versions was resolved.
    Patch by Matti Picus. (Github issue :issue:4236)

.. _0.29.27:

v0.29.27

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

Features added

  • A new decorator @cython.dataclasses.dataclass was implemented that provides
    compile time dataclass generation capabilities to cdef classes (extension types).
    Patch by David Woods. (Github issue :issue:2903). kw_only dataclasses
    added by Yury Sokov. (Github issue :issue:4794)

  • Named expressions (PEP 572) aka. assignment expressions (aka. the walrus operator
    :=) were implemented.
    Patch by David Woods. (Github issue :issue:2636)

  • Context managers can be written in parentheses.
    Patch by David Woods. (Github issue :issue:4814)

  • Cython avoids raising StopIteration in __next__ methods when possible.
    Patch by David Woods. (Github issue :issue:3447)

  • Some C++ and CPython library declarations were extended and fixed.
    Patches by Max Bachmann, Till Hoffmann, Julien Jerphanion, Wenjun Si.
    (Github issues :issue:4530, :issue:4528, :issue:4710, :issue:4746,
    :issue:4751, :issue:4818, :issue:4762, :issue:4910)

  • The cythonize and cython commands have a new option -M / --depfile
    to generate .dep dependency files for the compilation unit. This can be used
    by external build tools to track these dependencies.
    The cythonize option was already available in Cython :ref:0.29.27.
    Patches by Evgeni Burovski and Eli Schwartz. (Github issue :issue:1214)

  • cythonize() and the corresponding CLI command now regenerate the output files
    also when they already exist but were generated by a different Cython version.

  • Memory views and the internal Cython array type now identify as collections.abc.Sequence.
    Patch by David Woods. (Github issue :issue:4817)

  • Cython generators and coroutines now identify as CO_ASYNC_GENERATOR,
    CO_COROUTINE and CO_GENERATOR accordingly.
    (Github issue :issue:4902)

  • Memory views can use atomic CPU instructions instead of locks in more cases.
    Patch by Sam Gross. (Github issue :issue:4912)

  • The environment variable CYTHON_FORCE_REGEN=1 can be used to force cythonize
    to regenerate the output files regardless of modification times and changes.

  • A new Cython build option --cython-compile-minimal was added to compile only a
    smaller set of Cython's own modules, which can be used to reduce the package
    and install size.

  • Improvements to PyTypeObject definitions in pxd wrapping of libpython.
    Patch by John Kirkham. (Github issue :issue:4699)

Bugs fixed

  • Decorators like @cfunc and @ccall could leak into nested functions and classes.
    Patch by David Woods. (Github issue :issue:4092)

  • Exceptions within for-loops that run over memoryviews could lead to a ref-counting error.
    Patch by David Woods. (Github issue :issue:4662)

  • Using memoryview arguments in closures of inner functions could lead to ref-counting errors.
    Patch by David Woods. (Github issue :issue:4798)

  • Several optimised string methods failed to accept None as arguments to their options.
    Test patch by Kirill Smelkov. (Github issue :issue:4737)

  • A regression in 3.0.0a10 was resolved that prevented property setter methods from
    having the same name as their value argument.
    Patch by David Woods. (Github issue :issue:4836)

  • Typedefs for the bint type did not always behave like bint.
    Patch by Nathan Manville and 0dminnimda. (Github issue :issue:4660)

  • The return type of a fused function is no longer ignored for function pointers,
    since it is relevant when passing them e.g. as argument into other fused functions.
    Patch by David Woods. (Github issue :issue:4644)

  • The __self__ attribute of fused functions reports its availability correctly
    with hasattr(). Patch by David Woods.
    (Github issue :issue:4808)

  • pyximport no longer uses the deprecated imp module.
    Patch by Matúš Valo. (Github issue :issue:4560)

  • pyximport failed for long filenames on Windows.
    Patch by Matti Picus. (Github issue :issue:4630)

  • The generated C code failed to compile in CPython 3.11a4 and later.
    (Github issue :issue:4500)

  • A case of undefined C behaviour was resolved in the list slicing code.
    Patch by Richard Barnes. (Github issue :issue:4734)

  • Using the Limited API could report incorrect line numbers in tracebacks.

  • A work-around for StacklessPython < 3.8 was disabled in Py3.8 and later.
    (Github issue :issue:4329)

  • Improve conversion between function pointers with non-identical but
    compatible exception specifications. Patches by David Woods.
    (Github issues :issue:4770, :issue:4689)

  • The runtime size check for imported PyVarObject types was improved
    to reduce false positives and adapt to Python 3.11.
    Patch by David Woods. (Github issues :issue:4827, :issue:4894)

  • The generated modules no longer import NumPy internally when using
    fused types but no memoryviews.
    Patch by David Woods. (Github issue :issue:4935)

  • Improve compatibility with forthcoming CPython 3.12 release.

  • Limited API C preprocessor warning is compatible with MSVC. Patch by
    Victor Molina Garcia. (Github issue :issue:4826)

  • Some C compiler warnings were fixed.
    Patch by mwtian. (Github issue :issue:4831)

  • The parser allowed some invalid spellings of ....
    Patch by 0dminnimda. (Github issue :issue:4868)

  • Includes all bug-fixes and features from the 0.29 maintenance branch
    up to the :ref:0.29.32 release.

Other changes

  • When using type annotations, func(x: list) or func(x: ExtType) (and other
    Python builtin or extension types) no longer allow None as input argument to x.
    This is consistent with the normal typing semantics in Python, and was a common gotcha
    for users who did not expect None to be allowed as input. To allow None, use
    typing.Optional as in func(x: Optional[list]). None is also automatically
    allowed when it is used as default argument, i.e. func(x: list = None).
    int and float are now also recognised in type annotations and restrict the
    value type at runtime. They were previously ignored.
    Note that, for backwards compatibility reasons, the new behaviour does not apply when using
    Cython's C notation, as in func(list x). Here, None is still allowed, as always.
    Also, the annotation_typing directive can now be enabled and disabled more finely
    within the module.
    (Github issues :issue:3883, :issue:2696, :issue:4669, :issue:4606, :issue:4886)

  • The compile-time DEF and IF statements are deprecated and generate a warning.
    They should be replaced with normal constants, code generation or C macros.
    (Github issue :issue:4310)

  • Reusing an extension type attribute name as a method name is now an error.
    Patch by 0dminnimda. (Github issue :issue:4661)

  • Improve compatibility between classes pickled in Cython 3.0 and 0.29.x
    by accepting MD5, SHA-1 and SHA-256 checksums.
    (Github issue :issue:4680)

v0.29.26

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

Bugs fixed

  • An incompatibility with CPython 3.11.0a3 was resolved.
    (Github issue :issue:4499)

  • The in operator failed on literal lists with starred expressions.
    Patch by Arvind Natarajan. (Github issue :issue:3938)

  • A C compiler warning in PyPy about a missing struct field initialisation was resolved.

.. _0.29.25:

v0.29.25

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

Bugs fixed

  • Several incompatibilities with CPython 3.11 were resolved.
    Patches by David Woods, Victor Stinner, Thomas Caswell.
    (Github issues :issue:4411, :issue:4414, :issue:4415, :issue:4416, :issue:4420,
    :issue:4428, :issue:4473, :issue:4479, :issue:4480)

  • Some C compiler warnings were resolved.
    Patches by Lisandro Dalcin and others. (Github issue :issue:4439)

  • C++ std::move() should only be used automatically in MSVC versions that support it.
    Patch by Max Bachmann. (Github issue :issue:4191)

  • The Py_hash_t type failed to accept arbitrary "index" values.
    (Github issue :issue:2752)

  • Avoid copying unaligned 16-bit values since some platforms require them to be aligned.
    Use memcpy() instead to let the C compiler decide how to do it.
    (Github issue :issue:4343)

  • Cython crashed on invalid truthiness tests on C++ types without operator bool.
    Patch by David Woods. (Github issue :issue:4348)

  • The declaration of PyUnicode_CompareWithASCIIString() in cpython.unicode was incorrect.
    Patch by Max Bachmann. (Github issue :issue:4344)

.. _0.29.24:

v0.29.24

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

Bugs fixed

  • Inline functions in pxd files that used memory views could lead to invalid
    C code if the module that imported from them does not use memory views.
    Patch by David Woods. (Github issue :issue:1415)

  • Several declarations in libcpp.string were added and corrected.
    Patch by Janek Bevendorff. (Github issue :issue:4268)

  • Pickling unbound Cython compiled methods failed.
    Patch by Pierre Glaser. (Github issue :issue:2972)

  • The tracing code was adapted to work with CPython 3.10.

  • The optimised in operator failed on unicode strings in Py3.9 and later
    that were constructed from an external wchar_t source.
    Also, related C compiler warnings about deprecated C-API usage were resolved.
    (Github issue :issue:3925)

  • Some compiler crashes were resolved.
    Patch by David Woods. (Github issues :issue:4214, :issue:2811)

  • An incorrect warning about 'unused' generator expressions was removed.
    (GIthub issue :issue:1699)

  • The attributes gen.gi_frame and coro.cr_frame of Cython compiled
    generators and coroutines now return an actual frame object for introspection,
    instead of None.
    (Github issue :issue:2306)

.. _0.29.23:

v0.29.23

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

Bugs fixed

  • Some problems with Python 3.10 were resolved.
    Patches by Victor Stinner and David Woods. (Github issues :issue:4046, :issue:4100)

  • An incorrect "optimisation" was removed that allowed changes to a keyword
    dict to leak into keyword arguments passed into a function.
    Patch by Peng Weikang. (Github issue :issue:3227)

  • Multiplied str constants could end up as bytes constants with language_level=2.
    Patch by Alphadelta14 and David Woods. (Github issue :issue:3951)

  • PY_SSIZE_T_CLEAN does not get defined any more if it is already defined.
    Patch by Andrew Jones. (Github issue :issue:4104)

.. _0.29.22:

v0.29.22

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

Features added

  • Some declarations were added to the provided pxd includes.
    Patches by Zackery Spytz and John Kirkham.
    (Github issues :issue:3811, :issue:3882, :issue:3899, :issue:3901)

Bugs fixed

  • A crash when calling certain functions in Py3.9 and later was resolved.
    (Github issue :issue:3917)

  • const memory views of structs failed to compile.
    (Github issue :issue:2251)

  • const template declarations could not be nested.
    Patch by Ashwin Srinath. (Github issue :issue:1355)

  • The declarations in the cpython.pycapsule module were missing their
    const modifiers and generated incorrect C code.
    Patch by Warren Weckesser. (Github issue :issue:3964)

  • Casts to memory views failed for fused dtypes.
    Patch by David Woods. (Github issue :issue:3881)

  • repr() was assumed to return str instead of unicode with language_level=3.
    (Github issue :issue:3736)

  • Calling cpdef functions from cimported modules crashed the compiler.
    Patch by David Woods. (Github issue :issue:4000)

  • Cython no longer validates the ABI size of the NumPy classes it compiled against.
    See the discussion in numpy/numpy#432

  • A C compiler warning about enum value casting was resolved in GCC.
    (Github issue :issue:2749)

  • Coverage reporting in the annotated HTML file failed in Py3.9.
    Patch by Nick Pope. (Github issue :issue:3865)

  • The embedding code now reports Python errors as exit status.

  • Long type declarations could lead to (harmless) random changes in the
    C file when used in auto-generated Python wrappers or pickled classes.

Other changes

  • Variables defined as cpdef now generate a warning since this
    is currently useless and thus does not do what users would expect.
    Patch by David Woods. (Github issue :issue:3959)

.. _0.29.21:

v0.29.21

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

Bugs fixed

  • Fix a regression in 0.29.20 where __div__ failed to be found in extension types.
    (Github issue :issue:3688)

  • Fix a regression in 0.29.20 where a call inside of a finally clause could fail to compile.
    Patch by David Woods. (Github issue :issue:3712)

  • Zero-sized buffers could fail to validate as C/Fortran-contiguous.
    Patch by Clemens Hofreither. (Github issue :issue:2093)

  • exec() did not allow recent Python syntax features in Py3.8+ due to
    https://bugs.python.org/issue35975.
    (Github issue :issue:3695)

  • Binding staticmethods of Cython functions were not behaving like Python methods in Py3.
    Patch by Jeroen Demeyer and Michał Górny. (Github issue :issue:3106)

  • Pythran calls to NumPy methods no longer generate useless method lookup code.

  • The PyUnicode_GET_LENGTH() macro was missing from the cpython.* declarations.
    Patch by Thomas Caswell. (Github issue :issue:3692)

  • The deprecated PyUnicode_*() C-API functions are no longer used, except for Unicode
    strings that contain lone surrogates. Unicode strings that contain non-BMP characters
    or surrogate pairs now generate different C code on 16-bit Python 2.x Unicode deployments
    (such as MS-Windows). Generating the C code on Python 3.x is recommended in this case.
    Original patches by Inada Naoki and Victor Stinner.
    (Github issues :issue:3677, :issue:3721, :issue:3697)

  • Some template parameters were missing from the C++ std::unordered_map declaration.
    Patch by will. (Github issue :issue:3685)

  • Several internal code generation issues regarding temporary variables were resolved.
    (Github issue :issue:3708)

.. _0.29.20:

v0.29.20

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

Bugs fixed

  • Nested try-except statements with multiple return statements could crash
    due to incorrect deletion of the except as target variable.
    (Github issue :issue:3666)

  • The @classmethod decorator no longer rejects unknown input from other decorators.
    Patch by David Woods. (Github issue :issue:3660)

  • Fused types could leak into unrelated usages.
    Patch by David Woods. (Github issue :issue:3642)

  • Now uses Py_SET_SIZE() and Py_SET_REFCNT() in Py3.9+ to avoid low-level
    write access to these object fields.
    Patch by Victor Stinner. (Github issue :issue:3639)

  • The built-in abs() function could lead to undefined behaviour when used on
    the negative-most value of a signed C integer type.
    Patch by Serge Guelton. (Github issue :issue:1911)

  • Usages of sizeof() and typeid() on uninitialised variables no longer
    produce a warning.
    Patch by Celelibi. (Github issue :issue:3575)

  • The C++ typeid() function was allowed in C mode.
    Patch by Celelibi. (Github issue :issue:3637)

  • The error position reported for errors found in f-strings was misleading.
    (Github issue :issue:3674)

  • The new c_api_binop_methods directive was added for forward compatibility, but can
    only be set to True (the current default value). It can be disabled in Cython 3.0.

.. _0.29.19:

v0.29.19

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

Bugs fixed

  • A typo in Windows specific code in 0.29.18 was fixed that broke "libc.math".
    (Github issue :issue:3622)

  • A platform specific test failure in 0.29.18 was fixed.
    Patch by smutch. (Github issue :issue:3620)

.. _0.29.18:

v0.29.18

Compare Source

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

Bugs fixed

  • Exception position reporting could run into race conditions on threaded code.
    It now uses function-local variables again.

  • Error handling early in the module init code could lead to a crash.

  • Error handling in cython.array creation was improved to avoid calling
    C-API functions with an error held.

  • A memory corruption was fixed when garbage collection was triggered during calls
    to PyType_Ready() of extension type subclasses.
    (Github issue :issue:3603)

  • Memory view slicing generated unused error handling code which could negatively
    impact the C compiler optimisations for parallel OpenMP code etc. Also, it is
    now helped by static branch hints.
    (Github issue :issue:2987)

  • Cython's built-in OpenMP functions were not translated inside of call arguments.
    Original patch by Celelibi and David Woods. (Github issue :issue:3594)

  • Complex buffer item types of structs of arrays could fail to validate.
    Patch by Leo and smutch. (Github issue :issue:1407)

  • Decorators were not allowed on nested async def functions.
    (Github issue :issue:1462)

  • C-tuples could use invalid C struct casting.
    Patch by MegaIng. (Github issue :issue:3038)

  • Optimised %d string formatting into f-strings failed on float values.
    (Github issue :issue:3092)

  • Optimised aligned string formatting (%05s, %-5s) failed.
    (Github issue :issue:3476)

  • When importing the old Cython build_ext integration with distutils, the
    additional command line arguments leaked into the regular command.
    Patch by Kamekameha. (Github issue :issue:2209)

  • When using the CYTHON_NO_PYINIT_EXPORT option in C++, the module init function
    was not declared as extern "C".
    (Github issue :issue:3414)

  • Three missing timedelta access macros were added in cpython.datetime.

  • The signature of the NumPy C-API function PyArray_SearchSorted() was fixed.
    Patch by Brock Mendel. (Github issue :issue:3606)

.. _0.29.17:

v0.29.17

Compare Source

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

Features added

  • std::move() is now available from libcpp.utility.
    Patch by Omer Ozarslan. (Github issue :issue:2169)

  • The @cython.binding decorator is available in Python code.
    (Github issue :issue:3505)

Bugs fixed

  • Creating an empty unicode slice with large bounds could crash.
    Patch by Sam Sneddon. (Github issue :issue:3531)

  • Decoding an empty bytes/char* slice with large bounds could crash.
    Patch by Sam Sneddon. (Github issue :issue:3534)

  • Re-importing a Cython extension no longer raises the error
    "__reduce_cython__ not found".
    (Github issue :issue:3545)

  • Unused C-tuples could generate incorrect code in 0.29.16.
    Patch by Kirk Meyer. (Github issue :issue:3543)

  • Creating a fused function attached it to the garbage collector before it
    was fully initialised, thus risking crashes in rare failure cases.
    Original patch by achernomorov. (Github issue :issue:3215)

  • Temporary buffer indexing variables were not released and could show up in
    C compiler warnings, e.g. in generators.
    Patch by David Woods. (Github issues :issue:3430, :issue:3522)

  • The compilation cache in cython.inline("…") failed to take the language
    level into account.
    Patch by will-ca. (Github issue :issue:3419)

  • The deprecated PyUnicode_GET_SIZE() function is no longer used in Py3.

.. _0.29.16:

v0.29.16

Compare Source

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

Bugs fixed

  • Temporary internal variables in nested prange loops could leak into other
    threads. Patch by Frank Schlimbach. (Github issue :issue:3348)

  • Default arguments on fused functions could crash.
    Patch by David Woods. (Github issue :issue:3370)

  • C-tuples declared in .pxd files could generate incomplete C code.
    Patch by Kirk Meyer. (Github issue :issue:1427)

  • Fused functions were not always detected and optimised as Cython
    implemented functions.
    Patch by David Woods. (Github issue :issue:3384)

  • Valid Python object concatenation of (iterable) strings to non-strings
    could fail with an exception.
    Patch by David Woods. (Github issue :issue:3433)

  • Using C functions as temporary values lead to invalid C code.
    Original patch by David Woods. (Github issue :issue:3418)

  • Fix an unhandled C++ exception in comparisons.
    Patch by David Woods. (Github issue :issue:3361)

  • Fix deprecated import of "imp" module.
    Patch by Matti Picus. (Github issue :issue:3350)

  • Fix compatibility with Pythran 0.9.6 and later.
    Patch by Serge Guelton. (Github issue :issue:3308)

  • The _Py_PyAtExit() function in cpython.pylifecycle was misdeclared.
    Patch by Zackery Spytz. (Github issue :issue:3382)

  • Several missing declarations in cpython.* were added.
    Patches by Zackery Spytz. (Github issue :issue:3452, :issue:3421, :issue:3411, :issue:3402)

  • A declaration for libc.math.fpclassify() was added.
    Patch by Zackery Spytz. (Github issue :issue:2514)

  • Avoid "undeclared" warning about automatically generated pickle methods.
    Patch by David Woods. (Github issue :issue:3353)

  • Avoid C compiler warning about unreachable code in prange().

  • Some C compiler warnings in PyPy were resolved.
    Patch by Matti Picus. (Github issue :issue:3437)

.. _0.29.15:

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