fromfunctoolsimportreducefromoperatorimportor_fromthreadingimportThreadfromtypesimportSimpleNamespaceall_types= []forxinrange(400):classDummy:passall_types.append(Dummy)big_union=reduce(or_,all_types,int)forxinrange(500):s=SimpleNamespace()defstress_simplenamespace():forxinrange(20):varying_union=big_union|tuple[int, ...]|list[str, ...]|dict[str,int]repr(s)attr_name=f"t_attr_{x}"setattr(s,attr_name,varying_union)repr(s)repr(s)repr(s)alive= [Thread(target=stress_simplenamespace)forxinrange(8)]fortinalive:t.start()fortinalive:t.join()

Thread 7"Thread-6 (stres" received signal SIGSEGV, Segmentation fault.[Switching to Thread 0x7ffff541b640 (LWP 348490)]0x000055555567cdcdin setup_ga (args=<unknown at remote 0x7ffff5c20640>, origin=<type at remote 0x555555b11d40>, alias=0x2276a0e0140) at Objects/genericaliasobject.c:837837if (!PyTuple_Check(args)) {#0  0x000055555567cdcd in setup_ga (args=<unknown at remote 0x7ffff5c20640>, origin=<type at remote 0x555555b11d40>, alias=0x2276a0e0140)    at Objects/genericaliasobject.c:837#1  Py_GenericAlias (origin=<type at remote 0x555555b11d40>, args=<unknown at remote 0x7ffff5c20640>) at Objects/genericaliasobject.c:1015#2  0x0000555555658dd5 in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=9223372036854775809, args=0x7ffff541a428,    callable=<built-in method __class_getitem__ oftype object at remote 0x555555b11d40>, tstate=0x555555c3c6e0)    at ./Include/internal/pycore_call.h:169#3  PyObject_CallOneArg (func=<built-in method __class_getitem__ of type object at remote 0x555555b11d40>,    arg=arg@entry=<unknown at remote 0x7ffff5c20640>) at Objects/call.c:395#4  0x0000555555634781 in PyObject_GetItem (o=<type at remote 0x555555b11d40>, key=<unknown at remote 0x7ffff5c20640>) at Objects/abstract.c:193#5  0x00005555555e2f02 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>)    at Python/generated_cases.c.h:62#6  0x00005555557dd13e in _PyEval_EvalFrame (throwflag=0, frame=<optimized out>, tstate=0x555555c3c6e0) at ./Include/internal/pycore_ceval.h:119#7  _PyEval_Vector (tstate=0x555555c3c6e0, func=0x2275e37fd80, locals=0x0, args=0x7ffff541a8a8, argcount=<optimized out>, kwnames=<optimized out>)    at Python/ceval.c:1975

Thread 3"Thread-2 (stres" received signal SIGSEGV, Segmentation fault.[Switching to Thread 0x7ffff742f640 (LWP 343364)]clear_freelist (dofree=<optimized out>, is_finalization=<optimized out>, freelist=<optimized out>) at Objects/object.c:904904             dofree(ptr);#0  clear_freelist (dofree=<optimized out>, is_finalization=<optimized out>, freelist=<optimized out>) at Objects/object.c:904#1  _PyObject_ClearFreeLists (freelists=0x555555c30948, is_finalization=is_finalization@entry=1) at Objects/object.c:929#2  0x000055555585c521 in PyThreadState_Clear (tstate=tstate@entry=0x555555c2cf60) at Python/pystate.c:1703#3  0x0000555555904a10 in thread_run (boot_raw=0x555555c194a0) at ./Modules/_threadmodule.c:390#4  0x000055555587e27b in pythread_wrapper (arg=<optimized out>) at Python/thread_pthread.h:232#5  0x00007ffff7d31ac3 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442#6  0x00007ffff7dc3850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 185"asyncio_4" received signal SIGSEGV, Segmentation fault.[Switching to Thread 0xffffe31ff060 (LWP 1527140)]0x0000000000867ce8in _Py_TYPE (ob=<unknown at remote 0xdddddddddddddddd>) at ./Include/object.h:270270return ob->ob_type;#0  0x0000000000867ce8 in _Py_TYPE (ob=<unknown at remote 0xdddddddddddddddd>) at ./Include/object.h:270#1  union_repr (self=<unknown at remote 0xffffa425a9d0>) at Objects/unionobject.c:296#2  0x00000000006e61a8 in PyObject_Repr (v=<unknown at remote 0xffffa425a9d0>) at Objects/object.c:779#3  0x000000000082ada0 in unicode_fromformat_arg (writer=writer@entry=0xffffe31fb4e0, f=0xd88224 "R", f@entry=0xd88223 "%R", vargs=vargs@entry=0xffffe31fb410)    at Objects/unicodeobject.c:3101#4  0x000000000082b33c in unicode_from_format (writer=writer@entry=0xffffe31fb4e0, format=format@entry=0xd88220 "%U=%R",    vargs=<error reading variable: Cannot access memory at address 0x1>) at Objects/unicodeobject.c:3220#5  0x000000000082b68c in PyUnicode_FromFormatV (format=format@entry=0xd88220 "%U=%R", vargs=...) at Objects/unicodeobject.c:3254#6  0x000000000082b828 in PyUnicode_FromFormat (format=format@entry=0xd88220 "%U=%R") at Objects/unicodeobject.c:3268#7  0x00000000006e1038 in namespace_repr (ns=<types.SimpleNamespace at remote 0xffffa48e3c60>) at Objects/namespaceobject.c:129#8  0x000000000075e894 in object_str (self=self@entry=<types.SimpleNamespace at remote 0xffffa48e3c60>) at Objects/typeobject.c:7152#9  0x0000000000768d18 in wrap_unaryfunc (self=<types.SimpleNamespace at remote 0xffffa48e3c60>, args=<optimized out>, wrapped=0x75e854 <object_str>)    at Objects/typeobject.c:9536#10 0x00000000005d8ee0 in wrapperdescr_raw_call (kwds=<optimized out>, args=<optimized out>, self=<optimized out>, descr=<optimized out>) at Objects/descrobject.c:532#11 wrapper_call (self=<optimized out>, args=<optimized out>, kwds=<optimized out>) at Objects/descrobject.c:1437#12 0x00000000005ab38c in _PyObject_MakeTpCall (tstate=tstate@entry=0xffff48937210,    callable=callable@entry=<method-wrapper'__str__' of types.SimpleNamespace object at 0xffffa48e3c60>, args=args@entry=0xffffe31fbe58, nargs=nargs@entry=0,     keywords=keywords@entry=0x0) at Objects/call.c:242#13 0x00000000005aba68 in _PyObject_VectorcallTstate (tstate=0xffff48937210, callable=<method-wrapper '__str__' of types.SimpleNamespace object at 0xffffa48e3c60>,    args=0xffffe31fbe58, nargsf=9223372036854775808, kwnames=0x0) at ./Include/internal/pycore_call.h:167#14 0x00000000005aba98 in PyObject_Vectorcall (callable=callable@entry=<method-wrapper '__str__' of types.SimpleNamespace object at 0xffffa48e3c60>,    args=args@entry=0x0, nargsf=nargsf@entry=9223372036854775808, kwnames=kwnames@entry=0x0) at Objects/call.c:327

*** stack smashing detected***: terminatedThread 7"Thread-6 (stres" received signal SIGABRT, Aborted.[Switching to Thread 0x7ffff541b640 (LWP 351627)]__pthread_kill_implementation (no_tid=0, signo=6, threadid=0) at ./nptl/pthread_kill.c:44#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=0) at ./nptl/pthread_kill.c:44#1  __pthread_kill_internal (signo=6, threadid=0) at ./nptl/pthread_kill.c:78#2  __GI___pthread_kill (threadid=0, signo=signo@entry=6) at ./nptl/pthread_kill.c:89#3  0x00007ffff7cdf476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26#4  0x00007ffff7cc57f3 in __GI_abort () at ./stdlib/abort.c:79#5  0x00007ffff7d26677 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff7e7892e "*** %s ***: terminated\n")    at ../sysdeps/posix/libc_fatal.c:156#6  0x00007ffff7dd359a in __GI___fortify_fail (msg=msg@entry=0x7ffff7e78916 "stack smashing detected") at ./debug/fortify_fail.c:26#7  0x00007ffff7dd3566 in __stack_chk_fail () at ./debug/stack_chk_fail.c:24#8  0x000055555572321d in _Py_type_getattro_impl (type=<optimized out>, name=<optimized out>,    suppress_missing_attribute=suppress_missing_attribute@entry=0x7ffff541a194) at Objects/typeobject.c:6355#9  0x00005555556db432 in PyObject_GetOptionalAttr (v=v@entry=<type at remote 0x3b2b2e06800>, name=<optimized out>,    result=result@entry=0x7ffff541a1d0) at Objects/object.c:1345#10 0x000055555572ea38 in _Py_typing_type_repr (writer=writer@entry=0x3b2be090e80, p=<type at remote 0x3b2b2e06800>) at Objects/typevarobject.c:295#11 0x000055555577ad6e in union_repr (self=<typing.Union at remote 0x3b2c20e0820>) at Objects/unionobject.c:297#12 0x00005555556d80db in PyObject_Repr (v=<typing.Union at remote 0x3b2c20e0820>) at ./Include/object.h:277#13 PyObject_Repr (v=<typing.Union at remote 0x3b2c20e0820>) at Objects/object.c:754#14 0x0000555555765835 in unicode_fromformat_arg (vargs=0x7ffff541a278, f=0x555555937b12 "R", writer=0x7ffff541a300)    at Objects/unicodeobject.c:3101#15 unicode_from_format (writer=writer@entry=0x7ffff541a300, format=format@entry=0x555555937b0e "%U=%R", vargs=vargs@entry=0x7ffff541a340)    at Objects/unicodeobject.c:3220#16 0x000055555576fadf in PyUnicode_FromFormatV (vargs=0x7ffff541a340, format=0x555555937b0e "%U=%R") at Objects/unicodeobject.c:3254#17 PyUnicode_FromFormat (format=format@entry=0x555555937b0e "%U=%R") at Objects/unicodeobject.c:3268#18 0x00005555556d5802 in namespace_repr (ns=<types.SimpleNamespace at remote 0x3b2b2152310>) at Objects/namespaceobject.c:129#19 0x00005555556d80db in PyObject_Repr (v=<types.SimpleNamespace at remote 0x3b2b2152310>) at ./Include/object.h:277#20 PyObject_Repr (v=<types.SimpleNamespace at remote 0x3b2b2152310>) at Objects/object.c:754#21 0x00005555555e4883 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>)    at Python/generated_cases.c.h:2487#22 0x00005555557dd13e in _PyEval_EvalFrame (throwflag=0, frame=<optimized out>, tstate=0x555555c3c6e0) at ./Include/internal/pycore_ceval.h:119#23 _PyEval_Vector (tstate=0x555555c3c6e0, func=0x3b2b237fd80, locals=0x0, args=0x7ffff541a8a8, argcount=<optimized out>, kwnames=<optimized out>)    at Python/ceval.c:1975