StacktraceTop:visit_decref (op=0x20bfb08, data=0x0) at ../Modules/gcmodule.c:271 dict_traverse (op=0x20dec20, collect (generation=0) at ../Modules/gcmodule.c:296 _PyObject_GC_NewVar (tp=0x8276c0, nitems=4) PyTuple_New (size=4) at ../Objects/tupleobject.c:69
StacktraceTop: visit_decref (op=0x20bfb08, data=0x0) at ../Modules/ gcmodule. c:271 gcmodule. c:296 tupleobject. c:69
dict_traverse (op=0x20dec20,
collect (generation=0) at ../Modules/
_PyObject_GC_NewVar (tp=0x8276c0, nitems=4)
PyTuple_New (size=4) at ../Objects/