Fix isinstance() with generic protocol subclasses after subscripting #669
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Be sure to also merge this upstream in the cpython repo.
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--Guido (mobile)
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The bug is Python 2 specific, but I wanted to add tests to |
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Fixes #656
The problem is if a generic class inherits from a protocol, then
GenericMeta.__subclasscheck__()gets overridden with
_ProtocolMeta.__subclasscheck__()that calls the former viasuper(), thus causing an extra frame.