importabcimportbuiltinsimportcollections.abcimportitertoolsimporttypesimporttypingfromfunctoolsimportreducefromoperatorimportor_abc_types= [clsforclsinabc.__dict__.values()ifisinstance(cls,type)]builtins_types= [clsforclsinbuiltins.__dict__.values()ifisinstance(cls,type)]collections_abc_types= [clsforclsincollections.abc.__dict__.values()ifisinstance(cls,type)]collections_types= [clsforclsincollections.__dict__.values()ifisinstance(cls,type)]itertools_types= [clsforclsinitertools.__dict__.values()ifisinstance(cls,type)]types_types= [clsforclsintypes.__dict__.values()ifisinstance(cls,type)]typing_types= [clsforclsintyping.__dict__.values()ifisinstance(cls,type)]all_types= (abc_types+builtins_types+collections_abc_types+collections_types+itertools_types+types_types+typing_types)all_types= [tfortinall_typesifnotissubclass(t,BaseException)]BIG_UNION=reduce(or_,all_types,int)fromthreadingimportThreadfromtimeimportsleepforxinrange(100):union_list= [int|BIG_UNION]*17defstress_list():forxinrange(3):try:union_list.pop()exceptException:passrepr(union_list)sleep(0.006)union_list.__getitem__(None,None)alive= []forxinrange(25):alive.append(Thread(target=stress_list,args=()))fortinalive:t.start()

Thread 60 "Thread-59 (stre" received signal SIGSEGV, Segmentation fault.0x0000555555d21751 in _Py_TYPE (ob=<unknown at remote 0xdddddddddddddddd>) at ./Include/object.h:270270             return ob->ob_type;#0  0x0000555555d21751 in _Py_TYPE (ob=<unknown at remote 0xdddddddddddddddd>) at ./Include/object.h:270#1  union_repr (self=<optimized out>) at Objects/unionobject.c:296#2  0x0000555555b8949a in PyObject_Repr (v=<unknown at remote 0x7fffb48464b0>) at Objects/object.c:776#3  0x0000555555cc06a1 in PyUnicodeWriter_WriteRepr (writer=writer@entry=0x7fff660907f0,    obj=<unknown at remote 0x207c>) at Objects/unicodeobject.c:13951#4  0x0000555555aeba03 in list_repr_impl (v=0x7fffb4a8dc90) at Objects/listobject.c:606#5  list_repr (self=[]) at Objects/listobject.c:633#6  0x0000555555b8949a in PyObject_Repr (v=[]) at Objects/object.c:776#7  0x0000555555e07abf in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>,    throwflag=<optimized out>) at Python/generated_cases.c.h:2306#8  0x0000555555ddcf53 in _PyEval_EvalFrame (tstate=0x529000325210, frame=0x529000384328, throwflag=0)    at ./Include/internal/pycore_ceval.h:119#9  _PyEval_Vector (tstate=0x529000325210, func=0x7fffb4828dd0, locals=0x0, args=<optimized out>,    argcount=1, kwnames=0x0) at Python/ceval.c:1917#10 0x0000555555a4f42b in _PyObject_VectorcallTstate (tstate=0x529000325210,    callable=<function at remote 0x7fffb4828dd0>, args=0x207c, nargsf=3, nargsf@entry=1,    kwnames=<unknown at remote 0x7fff66090450>, kwnames@entry=0x0) at ./Include/internal/pycore_call.h:169#11 0x0000555555a4ccbf in method_vectorcall (method=<optimized out>, args=<optimized out>,    nargsf=<optimized out>, kwnames=<optimized out>) at Objects/classobject.c:72#12 0x0000555555e8005b in _PyObject_VectorcallTstate (tstate=0x529000325210,    callable=<method at remote 0x7fff660c0eb0>, args=0x7fff93df06d8, nargsf=0, kwnames=0x0)    at ./Include/internal/pycore_call.h:169#13 context_run (self=<_contextvars.Context at remote 0x7fffb4a8ebf0>, args=<optimized out>,    nargs=<optimized out>, kwnames=0x0) at Python/context.c:728#14 0x0000555555e0a3e7 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>,    throwflag=<optimized out>) at Python/generated_cases.c.h:3551

python: Objects/unionobject.c:296: PyObject *union_repr(PyObject *): Assertion `PyTuple_Check(alias->args)' failed.