StacktraceTop: visit_decref () at ../Modules/gcmodule.c:373 subtract_refs () at ../Modules/gcmodule.c:398 collect () at ../Modules/gcmodule.c:969 collect_with_callback () at ../Modules/gcmodule.c:1140 PyGC_Collect () at ../Modules/gcmodule.c:1616
StacktraceTop: gcmodule. c:373 gcmodule. c:398 gcmodule. c:969 with_callback () at ../Modules/ gcmodule. c:1140 gcmodule. c:1616
visit_decref () at ../Modules/
subtract_refs () at ../Modules/
collect () at ../Modules/
collect_
PyGC_Collect () at ../Modules/