[issue23020] New matmul operator crashes modules compiled with CPython3.4

[Arfrever Frehtes Taifersar Arahesis]

Arfrever Frehtes Taifersar Arahesis added the comment:

Extensions need not to be rebuilt only when using stable ABI:
https://www.python.org/dev/peps/pep-0384/

But mytest.c fails to build with -DPy_LIMITED_API so it uses features from outside of stable ABI and must be rebuilt.

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nosy: +Arfrever

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<http://bugs.python.org/issue23020>
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