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_ccall_callback method of_lsprof.Profiler causes Fatal Python error #132250

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extension-modulesC modules in the Modules dirtype-crashA hard crash of the interpreter, possibly with a core dump
@devdanzin

Description

@devdanzin

Crash report

What happened?

When a_lsprof.Profiler is enabled and aTypeError is raised from mismatching descriptor and target, a Fatal Python error happens due to_ccall_callback returning a result with an exception set:

import_lsprofprof=_lsprof.Profiler()prof.enable()defmismatch(first,second):first.find(second())mismatch(bytes,str)# mismatch(str, bytes)# mismatch(str, list)FatalPythonerror:_Py_CheckFunctionResult:afunctionreturnedaresultwithanexceptionsetPythonruntimestate:initializedTypeError:descriptor'find'for'bytes'objectsdoesn't apply to a 'str'objectTheaboveexceptionwasthedirectcauseofthefollowingexception:SystemError:<built-inmethod_ccall_callbackof_lsprof.Profilerobjectat0x20000922f10>returnedaresultwithanexceptionsetStack (mostrecentcallfirst):File"/mnt/c/Users/ddini/crashers/main/cProfile-fatal_python_error-abort/source2.py",line7inmismatchFile"/mnt/c/Users/ddini/crashers/main/cProfile-fatal_python_error-abort/source2.py",line9in<module>ProgramreceivedsignalSIGABRT,Aborted.

Backtrace:

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=140737350580032) at ./nptl/pthread_kill.c:44#1  __pthread_kill_internal (signo=6, threadid=140737350580032) at ./nptl/pthread_kill.c:78#2  __GI___pthread_kill (threadid=140737350580032, signo=signo@entry=6) at ./nptl/pthread_kill.c:89#3  0x00007ffff7ce0476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26#4  0x00007ffff7cc67f3 in __GI_abort () at ./stdlib/abort.c:79#5  0x000055555590ba45 in fatal_error_exit (status=<optimized out>) at Python/pylifecycle.c:3140#6  0x000055555591879a in fatal_error (fd=2, header=header@entry=1,    prefix=prefix@entry=0x555555a27b40 <__func__.23> "_Py_CheckFunctionResult",    msg=msg@entry=0x555555a275a0 "a function returned a result with an exception set", status=status@entry=-1)    at Python/pylifecycle.c:3356#7  0x000055555591880c in _Py_FatalErrorFunc (func=func@entry=0x555555a27b40 <__func__.23> "_Py_CheckFunctionResult",    msg=msg@entry=0x555555a275a0 "a function returned a result with an exception set") at Python/pylifecycle.c:3372#8  0x000055555567dfe8 in _Py_CheckFunctionResult (tstate=tstate@entry=0x555555cd6498 <_PyRuntime+361432>,    callable=callable@entry=<built-in method _ccall_callback of _lsprof.Profiler object at remote 0x20000922f10>,    result=<optimized out>, where=where@entry=0x0) at Objects/call.c:65#9  0x00005555558f1298 in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=9223372036854775812, args=0x7fffffffd478,    callable=<built-in method _ccall_callback of _lsprof.Profiler object at remote 0x20000922f10>,    tstate=0x555555cd6498 <_PyRuntime+361432>) at ./Include/internal/pycore_call.h:170#10 call_one_instrument (interp=interp@entry=0x555555c9de40 <_PyRuntime+130432>,    tstate=tstate@entry=0x555555cd6498 <_PyRuntime+361432>, args=args@entry=0x7fffffffd478,    nargsf=nargsf@entry=9223372036854775812, tool=tool@entry=2 '\002', event=event@entry=4) at Python/instrumentation.c:985#11 0x00005555558f373f in call_instrumentation_vector (instr=instr@entry=0x200009f241c,    tstate=tstate@entry=0x555555cd6498 <_PyRuntime+361432>, event=event@entry=4, frame=frame@entry=0x7ffff7fb0090,    arg2=arg2@entry=0x200009f241c, nargs=<optimized out>, nargs@entry=4, args=0x7fffffffd470) at Python/instrumentation.c:1172#12 0x00005555558f5d65 in _Py_call_instrumentation_2args (tstate=tstate@entry=0x555555cd6498 <_PyRuntime+361432>,    event=event@entry=4, frame=frame@entry=0x7ffff7fb0090, instr=instr@entry=0x200009f241c, arg0=<optimized out>,    arg1=<optimized out>) at Python/instrumentation.c:1227#13 0x0000555555867263 in _PyEval_EvalFrameDefault (tstate=tstate@entry=0x555555cd6498 <_PyRuntime+361432>, frame=0x7ffff7fb0090,    frame@entry=0x7ffff7fb0020, throwflag=throwflag@entry=0) at Python/generated_cases.c.h:6122#14 0x00005555558859f2 in _PyEval_EvalFrame (throwflag=0, frame=0x7ffff7fb0020, tstate=0x555555cd6498 <_PyRuntime+361432>)    at ./Include/internal/pycore_ceval.h:119

Found usingfusil by@vstinner.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.14.0a6+ (heads/main:be2d2181e62, Mar 31 2025, 07:30:17) [GCC 11.4.0]

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