Message 300621 - Python tracker

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"like GH-2966, most types with Py_TPFLAGS_HAVE_GC should call PyObject_GC_UnTrack() at top of the tp_dealloc."

Hum, I wasn't aware of that. Writing correctly code for the Python garbage collector is very complex :-/

Maybe it would help to have a short comment, maybe with a link to this issue, on each PyObject_GC_UnTrack().

At the first read, I saw the newly added PyObject_GC_UnTrack() calls as duplicate, and so useless. For example, PyObject_Del() already untracks the object, so it doesn't seem to be needed to explicitly call PyObject_GC_UnTrack() "just before".