Message351098
gc_crash.py:
* PyObject_GC_UnTrack() + PyObject_GC_Track() is used to order objects in the GC collection 0, the objects which are involved in the reference cycle.
* BadGC2Type type is implemented in C, uses Py_TPFLAGS_HAVE_GC, implements tp_traverse, but it doesn't implement tp_clear.
* IHMO gc_crash.py is only legit code. BadGC2Type implements the GC protocol (except to tp_clear).
I'm not sure that it's the same bug than reproducer.tar.gz which uses a weak reference.
BadGC2Type is used to call a function in tp_dealloc. It should be possible to use a weak reference for that: the weak reference can use a callback. But I failed write a reproducer script using a weak reference. |
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Date |
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Action |
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2019-09-03 19:22:20 | vstinner | set | recipients:
+ vstinner, pitrou, christian.heimes, petr.viktorin, lukasz.langa, Mark.Shannon, jdemeyer, pablogsal |
2019-09-03 19:22:20 | vstinner | set | messageid: <1567538540.65.0.539449668045.issue38006@roundup.psfhosted.org> |
2019-09-03 19:22:20 | vstinner | link | issue38006 messages |
2019-09-03 19:22:20 | vstinner | create | |
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