[issue45665] Problems caused by isinstance(list[int], type) returning True

[Alex Waygood]

Alex Waygood <Alex.Waygood at Gmail.com> added the comment:

`isinstance(list[int], type)` returns `True` in 3.9 as well, so the behaviour has been around for a while. (Not a comment on whether the change is worth making, just a note.)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45665>
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