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bpo-38908: Fix issue when non runtime_protocol failed to raise TypeError (#26067)

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Yurii Karabas 2021-05-12 18:47:49 +03:00 • committed by GitHub
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Fix issue where :mod:`typing` protocols without the ``@runtime_checkable``
decorator did not raise a ``TypeError`` when used with ``issubclass`` and
``isinstance``. Now, subclassses of ``typing.Protocol`` will raise a
``TypeError`` when used with with those checks.
Patch provided by Yurii Karabas.