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GH-105840: Fix assertion failures when specializing calls with too many __defaults__ (GH-105847)

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Brandt Bucher 2023-06-16 11:01:15 -07:00 • committed by GitHub
parent b356a4749a
commit 2beab5bdef
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3 changed files with 33 additions and 2 deletions
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Python/specialize.c
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@ -1647,9 +1647,9 @@ specialize_py_call(PyFunctionObject *func, _Py_CODEUNIT *instr, int nargs,
}
int argcount = code->co_argcount;
int defcount = func->func_defaults == NULL ? 0 : (int)PyTuple_GET_SIZE(func->func_defaults);
assert(defcount <= argcount);
int min_args = argcount-defcount;
if (nargs > argcount || nargs < min_args) {
// GH-105840: min_args is negative when somebody sets too many __defaults__!
if (min_args < 0 || nargs > argcount || nargs < min_args) {
SPECIALIZATION_FAIL(CALL, SPEC_FAIL_WRONG_NUMBER_ARGUMENTS);
return -1;
}