[issue35983] tp_dealloc trashcan shouldn't be called for subclasses

[Jeroen Demeyer]

Jeroen Demeyer <J.Demeyer at UGent.be> added the comment:

I created an additional PR 12607 with some more changes to the, in particular to make the old backwards-compatibility trashcan macros safer. This should be seen as part of the same bugfix but I decided to make a new PR because PR 11841 had several positive reviews already.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35983>
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