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

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

PEP384 is presented as a new way to write modules that can be loaded by multiple Python versions, specially on Windows.
I could not find any place that says that modules not using the stable ABI need to be recompiled.

I'm not against changing this rule (after all, I started on Windows platform where all this discussion does not apply), but it should be clearly stated somewhere in the API docs, and also in the "whatsnew" pages (all of them?)

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