[issue34536] Enum._missing_ doesn't raise TypeError when a non-Enum object is a returned

[Ethan Furman]

Change by Ethan Furman <ethan at stoneleaf.us>:


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keywords: +patch
pull_requests: +8636
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34536>
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