fromthreadingimportThreadimportgrpforxinrange(5000):alive= [Thread(target=grp.getgrgid,args=(1,)),Thread(target=grp.getgrall),Thread(target=grp.getgrnam,args=('root',)),    ]forobjinalive:print('START',obj)obj.start()

(gdb) bt#0  __strlen_avx2 ()    at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74#1  0x00005555557ad3cb in PyUnicode_DecodeFSDefault (    s=s@entry=0x3838323432353a78 <error: Cannot access memory ataddress0x3838323432353a78>) at Objects/unicodeobject.c:4058#2  0x00007ffff7c3f952 in mkgrent (    module=module@entry=0x20000795b80, p=<optimized out>)    at ./Modules/grpmodule.c:83#3  0x00007ffff7c3fc41 in grp_getgrall_impl (    module=0x20000795b80) at ./Modules/grpmodule.c:291#4  0x00007ffff7c3fcad in grp_getgrall (    module=<optimized out>, _unused_ignored=<optimized out>)    at ./Modules/clinic/grpmodule.c.h:83#5  0x00005555556fca83 in cfunction_vectorcall_NOARGS (    func=0x2000079f820,args=<optimized out>,    nargsf=<optimized out>, kwnames=<optimized out>)    at Objects/methodobject.c:495#6  0x000055555567b4bc in _PyVectorcall_Call (    tstate=tstate@entry=0x555555d2ac70,    func=0x5555556fc8b5 <cfunction_vectorcall_NOARGS>,    callable=callable@entry=0x2000079f820,    tuple=tuple@entry=0x555555c5d1d8 <_PyRuntime+128984>,    kwargs=kwargs@entry=0x2001a0400d0) at Objects/call.c:273#7  0x000055555567b894 in _PyObject_Call (    tstate=0x555555d2ac70,    callable=callable@entry=0x2000079f820,args=args@entry=0x555555c5d1d8 <_PyRuntime+128984>,    kwargs=kwargs@entry=0x2001a0400d0) at Objects/call.c:348#8  0x000055555567b8f1 in PyObject_Call (    callable=callable@entry=0x2000079f820,args=args@entry=0x555555c5d1d8 <_PyRuntime+128984>,    kwargs=kwargs@entry=0x2001a0400d0) at Objects/call.c:373