[issue41295] CPython 3.8.4 regression on __setattr__ in multiinheritance with metaclasses

[David Lord]

David Lord <davidism at gmail.com> added the comment:

It appears to be solved in Flask-SQLAlchemy's development version already, as the mixins now inherit from `type`. We caught the issue when we started applying flake8 (possibly through flake8-bugbear).

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nosy: +davidism

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41295>
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