[issue31418] assertion failure in PyErr_WriteUnraisable() in case of an exception with a bad __module__

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Printing '<unknown>' LGTM.

Implicit converting to str can raise a warning or exception if __module__ is a bytes object.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31418>
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