[issue40533] [subinterpreters] Don't share Python objects between interpreters

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

> For example, PyModule_Type is declared statically and so shared by all interpreters and so PyModule_Type.tp_mro tuple is accessed in parallel by multiple interpreters.

Another example of this issue are parallel Py_INCREF/Py_DECREF calls on the tp_bases member of a type.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40533>
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