[issue37879] Segfaults in C heap type subclasses

[Petr Viktorin]

Change by Petr Viktorin <encukou at gmail.com>:


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pull_requests: +15629
pull_request: https://github.com/python/cpython/pull/16004

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37879>
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