[issue28603] traceback module can't format/print unhashable exceptions

[Berker Peksag]

Berker Peksag added the comment:

Thanks for the patch. Out of curiosity, how did you get an unhashable exception? Is there a way to reproduce this without creating a custom exception and set __hash__ to None? In other words, what's your use case?

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nosy: +berker.peksag
stage:  -> patch review
type:  -> behavior
versions: +Python 3.5, Python 3.6, Python 3.7

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