[issue44606] Discrepancy between isinstance() and issubclass() for union types

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I have found this when refactored the code of Objects/unionobject.c. So I have a patch which fixes this, but I want to make sure what behavior is considered correct.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44606>
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