Ronald Oussoren <ronaldousso...@mac.com> added the comment:
The debug build seems to indicate that slot memory is not initiated properly, a
stack trace (note the argument to visit_validate at frame #7):
* frame #0: 0x000000019b60d9b8 libsystem_kernel.dylib`__pthread_kill + 8
frame #1: 0x000000019b640eb0 libsystem_pthread.dylib`pthread_kill + 288
frame #2: 0x000000019b57e314 libsystem_c.dylib`abort + 164
frame #3: 0x000000010030c4f4 python.exe`fatal_error_exit(status=-1) at
pylifecycle.c:2624:9
frame #4: 0x000000010030c3cc python.exe`fatal_error(fd=2, header=1,
prefix="_PyObject_AssertFailed", msg="_PyObject_AssertFailed", status=-1) at
pylifecycle.c:2805:5
frame #5: 0x000000010030be20
python.exe`_Py_FatalErrorFunc(func="_PyObject_AssertFailed",
msg="_PyObject_AssertFailed") at pylifecycle.c:2821:5
frame #6: 0x0000000100169fe0
python.exe`_PyObject_AssertFailed(obj=0x0000000100d63690,
expr=0x0000000000000000, msg="PyObject_GC_Track() object is not valid",
file="../Modules/gcmodule.c", line=2187, function="visit_validate") at
object.c:2293:5
frame #7: 0x0000000100351184
python.exe`visit_validate(op=0xcdcdcdcdcdcdcdcd, parent_raw=0x0000000100d63690)
at gcmodule.c:2186:9
frame #8: 0x000000010019845c
python.exe`traverse_slots(type=0x0000000101813230, self=0x0000000100d63690,
visit=(python.exe`visit_validate at gcmodule.c:2183), arg=0x0000000100d63690)
at typeobject.c:1207:27
frame #9: 0x0000000100197fe8
python.exe`subtype_traverse(self=0x0000000100d63690,
visit=(python.exe`visit_validate at gcmodule.c:2183), arg=0x0000000100d63690)
at typeobject.c:1228:23
frame #10: 0x0000000100350fdc
python.exe`PyObject_GC_Track(op_raw=0x0000000100d63690) at gcmodule.c:2212:11
----------
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<https://bugs.python.org/issue46891>
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