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[3.11] GH-96678: Fix undefined behavior in ceval.c (GH-96708) #96732

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Merged
miss-islington merged 1 commit into from
Sep 10, 2022
Merged

[3.11] GH-96678: Fix undefined behavior in ceval.c (GH-96708) #96732

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-09-09-13-13-27.gh-issue-96678.vMxi9F.rst
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@@ -0,0 +1 @@
Fix case of undefined behavior in ceval.c
8 changes: 7 additions & 1 deletion Python/ceval.c
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Expand Up @@ -6166,7 +6166,13 @@ initialize_locals(PyThreadState *tstate, PyFunctionObject *func,
/* Pack other positional arguments into the *args argument */
if (co->co_flags & CO_VARARGS) {
PyObject *u = NULL;
u = _PyTuple_FromArraySteal(args + n, argcount - n);
if (argcount == n) {
u = Py_NewRef(&_Py_SINGLETON(tuple_empty));
}
else {
assert(args != NULL);
u = _PyTuple_FromArraySteal(args + n, argcount - n);
}
if (u == NULL) {
goto fail_post_positional;
}
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