[issue22079] Ensure in PyType_Ready() that base class of static type is static

[Xiang Zhang]

Xiang Zhang added the comment:

Oh yes. The mro list can be customized so we can not even guarantee the type appears at index 0 and object at index n-1. It seems we should still keep what it is now, iterating the whole mro list.

Sorry that my previous comments seem to be noise. But maybe we can add one comment to clarify that iterating the whole list is needed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22079>
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