[issue33018] Improve issubclass() error checking and message

[INADA Naoki]

INADA Naoki <songofacandy at gmail.com> added the comment:


New changeset f757b72b2524ce3451d2269f0b8a9f0593a7b27f by INADA Naoki in branch 'master':
bpo-32999: Revert GH-6002 (fc7df0e6) (GH-6189)
https://github.com/python/cpython/commit/f757b72b2524ce3451d2269f0b8a9f0593a7b27f


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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33018>
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