Duane Griffin added the comment:
Apologies: compiling python with --with-pydebug all of these issues are
reproducible on head after all. Furthermore while my patch fixes the reported
crash it still crashes on exit:
Program received signal SIGSEGV, Segmentation fault.
0x0000000000437193 in visit_decref (op=0x7ffff68a4c98, data=0x0) at
Modules/gcmodule.c:374
374 if (PyObject_IS_GC(op)) {
(gdb) bt
#0 0x0000000000437193 in visit_decref (op=0x7ffff68a4c98, data=0x0) at
Modules/gcmodule.c:374
#1 0x00000000004a9112 in tupletraverse (o=0x7ffff68a49f8, visit=0x43716d
<visit_decref>, arg=0x0) at Objects/tupleobject.c:571
#2 0x000000000043690a in subtract_refs (containers=containers@entry=0x87cda0
<generations+64>) at Modules/gcmodule.c:399
#3 0x0000000000437ac3 in collect (generation=generation@entry=2,
n_collected=n_collected@entry=0x7fffffffd838,
n_uncollectable=n_uncollectable@entry=0x7fffffffd840,
nofail=nofail@entry=0) at Modules/gcmodule.c:956
#4 0x0000000000437f57 in collect_with_callback (generation=generation@entry=2)
at Modules/gcmodule.c:1128
#5 0x00000000004383a6 in PyGC_Collect () at Modules/gcmodule.c:1592
#6 0x00000000004383cf in _PyGC_CollectIfEnabled () at Modules/gcmodule.c:1605
#7 0x0000000000420c76 in Py_FinalizeEx () at Python/pylifecycle.c:603
#8 0x000000000043682b in Py_Main (argc=argc@entry=2, argv=argv@entry=0x90d010)
at Modules/main.c:798
#9 0x000000000041d153 in main (argc=2, argv=0x7fffffffdae8) at
./Programs/python.c:69
----------
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<http://bugs.python.org/issue27945>
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