importtimeimportthreadingimport_threaddeff():try:f()exceptRecursionError:f()defg():try:raiseValueError()    except*ValueError:f()defh():time.sleep(1)_thread.interrupt_main()t=threading.Thread(target=h)t.start()g()t.join()

python: Objects/typeobject.c:4183: _PyType_Lookup: Assertion `!PyErr_Occurred()' failed.Aborted (core dumped)

#00x00007ffff7d3f34c in__pthread_kill_implementation () from /usr/lib/libc.so.6#10x00007ffff7cf24b8 inraise () from /usr/lib/libc.so.6#20x00007ffff7cdc534 inabort () from /usr/lib/libc.so.6#30x00007ffff7cdc45c in __assert_fail_base.cold () from /usr/lib/libc.so.6#40x00007ffff7ceb116 in__assert_fail () from /usr/lib/libc.so.6#50x000055555574ecd9 in_PyType_Lookup (type=type@entry=0x555555be5430, name=name@entry=0x555555bb7c10 <_PyRuntime+334480>)    at Objects/typeobject.c:4183#60x00005555557319e3 in_PyObject_GenericGetAttrWithDict (obj=0x7ffff77a7c90, name=0x555555bb7c10 <_PyRuntime+334480>, dict=dict@entry=0x0,     suppress=suppress@entry=1) at Objects/object.c:1266#70x0000555555731d8d in_PyObject_LookupAttr (v=0x7ffff77a7c90, name=<optimized out>, result=result@entry=0x7ffffff40780) at Objects/object.c:933#80x000055555582764c inprint_exception_file_and_line (ctx=ctx@entry=0x7fffffffe270, value_p=value_p@entry=0x7ffffff40808)    at Python/pythonrun.c:941#90x0000555555827ed2 inprint_exception (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff77a7c90) at Python/pythonrun.c:1209#100x0000555555827fcc inprint_exception_group (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff77a7c90) at Python/pythonrun.c:1377#110x0000555555828418 inprint_exception_recursive (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff77a7c90) at Python/pythonrun.c:1491#120x0000555555828491 inprint_chained (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff77a7c90,     message=message@entry=0x55555594b200 <context_message>"During handling of the above exception, another exception occurred:\n",     tag=tag@entry=0x5555558deda0"context") at Python/pythonrun.c:1254#130x000055555582868e inprint_exception_cause_and_context (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff780e900)    at Python/pythonrun.c:1344#140x00005555558283d3 inprint_exception_recursive (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff780e900) at Python/pythonrun.c:1482#150x0000555555828491 inprint_chained (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff780e900,     message=message@entry=0x55555594b200 <context_message>"During handling of the above exception, another exception occurred:\n",     tag=tag@entry=0x5555558deda0"context") at Python/pythonrun.c:1254...#161860x000055555582868e inprint_exception_cause_and_context (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff6be0ec0)    at Python/pythonrun.c:1344#161870x00005555558283d3 inprint_exception_recursive (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff6be0ec0) at Python/pythonrun.c:1482#161880x0000555555828491 inprint_chained (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff6be0ec0,    message=message@entry=0x55555594b200 <context_message>"During handling of the above exception, another exception occurred:\n",    tag=tag@entry=0x5555558deda0"context") at Python/pythonrun.c:1254#161890x000055555582868e inprint_exception_cause_and_context (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff6be0f30)    at Python/pythonrun.c:1344#161900x00005555558283d3 inprint_exception_recursive (ctx=ctx@entry=0x7fffffffe270, value=value@entry=0x7ffff6be0f30) at Python/pythonrun.c:1482#161910x0000555555828969 in_PyErr_Display (file=file@entry=0x7ffff79ba7b0, exception=exception@entry=0x555555a75160 <_PyExc_KeyboardInterrupt>,    value=value@entry=0x7ffff6be0f30, tb=tb@entry=0x7ffff6c22ad0) at Python/pythonrun.c:1530#161920x0000555555828ad3 inPyErr_Display (exception=0x555555a75160 <_PyExc_KeyboardInterrupt>, value=0x7ffff6be0f30, tb=0x7ffff6c22ad0)    at Python/pythonrun.c:1562#161930x0000555555835660 insys_excepthook_impl (module=module@entry=0x7ffff7947f50, exctype=<optimized out>, value=<optimized out>,    traceback=<optimized out>) at ./Python/sysmodule.c:748#161940x00005555558356c6 insys_excepthook (module=0x7ffff7947f50, args=args@entry=0x7fffffffe3f0, nargs=nargs@entry=3)    at ./Python/clinic/sysmodule.c.h:102#161950x000055555572c28c incfunction_vectorcall_FASTCALL (func=0x7ffff7948470, args=0x7fffffffe3f0, nargsf=<optimized out>, kwnames=<optimized out>)    at Objects/methodobject.c:422#161960x00005555556e1aa0 in_PyObject_VectorcallTstate (tstate=0x555555bd8808 <_PyRuntime+468616>, callable=callable@entry=0x7ffff7948470,    args=0x7fffffffe3f0, args@entry=0x7fffffffe360, nargsf=nargsf@entry=3, kwnames=kwnames@entry=0x0) at ./Include/internal/pycore_call.h:92#161970x00005555556e1b90 in_PyObject_FastCallTstate (nargs=3, args=0x7fffffffe360, func=0x7ffff7948470, tstate=<optimized out>)    at ./Include/internal/pycore_call.h:116#16198_PyObject_FastCall (func=func@entry=0x7ffff7948470, args=args@entry=0x7fffffffe3f0, nargs=nargs@entry=3) at Objects/call.c:310#161990x0000555555828c2b in_PyErr_PrintEx (tstate=0x555555bd8808 <_PyRuntime+468616>, set_sys_last_vars=set_sys_last_vars@entry=1)    at Python/pythonrun.c:813#162000x0000555555828eb1 inPyErr_PrintEx (set_sys_last_vars=set_sys_last_vars@entry=1) at Python/pythonrun.c:861#162010x0000555555828ec1 inPyErr_Print () at Python/pythonrun.c:867#162020x00005555558293ab in_PyRun_SimpleFileObject (fp=fp@entry=0x555555bdb530, filename=filename@entry=0x7ffff77adbc0, closeit=closeit@entry=1,    flags=flags@entry=0x7fffffffe508) at Python/pythonrun.c:439#162030x000055555582951d in_PyRun_AnyFileObject (fp=fp@entry=0x555555bdb530, filename=filename@entry=0x7ffff77adbc0, closeit=closeit@entry=1,    flags=flags@entry=0x7fffffffe508) at Python/pythonrun.c:78#162040x00005555558487a5 inpymain_run_file_obj (program_name=program_name@entry=0x7ffff77c7370, filename=filename@entry=0x7ffff77adbc0,    skip_source_first_line=0) at Modules/main.c:360#162050x00005555558488cd inpymain_run_file (config=config@entry=0x555555bbd3c0 <_PyRuntime+356928>) at Modules/main.c:379#162060x0000555555849063 inpymain_run_python (exitcode=exitcode@entry=0x7fffffffe684) at Modules/main.c:610#162070x000055555584930f inPy_RunMain () at Modules/main.c:689#162080x0000555555849386 inpymain_main (args=args@entry=0x7fffffffe6e0) at Modules/main.c:719#162090x000055555584944c inPy_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:743#162100x0000555555651772 inmain (argc=<optimized out>, argv=<optimized out>) at ./Programs/python.c:15