[issue40217] The garbage collector doesn't take in account that objects of heap allocated types hold a strong reference to their type

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

I'm not comfortable with requesting authors of all C extensions to modify their tp_traverse function. As Pablo explained, the type is already visited on subtypes instances. I approved PR 19414.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40217>
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