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

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

In your example you can add

    PyTypeObject *tp = Py_TYPE(self);
    Py_TYPE(self) = &PyList_Type;
    if (PyType_GetFlags(tp) & Py_TPFLAGS_HEAPTYPE) {
        Py_DECREF(tp);
    }

before calling PyList_Type.tp_dealloc().

It is possible to add such code directly in PyList_Type.tp_dealloc and other deallocators that use the trashcan mechanism.

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