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gh-115733: Fix crash involving exhausted list iterator (#115740)

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* gh-115733: Fix crash involving exhausted iterator

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Sam Gross 2024-02-20 15:18:44 -05:00 • committed by GitHub
parent 494739e1f7
commit 520403ed4c
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6 changed files with 13 additions and 5 deletions
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Objects/listobject.c
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@ -3537,13 +3537,13 @@ listreviter_next(PyObject *self)
{
listreviterobject *it = (listreviterobject *)self;
assert(it != NULL);
PyListObject *seq = it->it_seq;
assert(PyList_Check(seq));
Py_ssize_t index = LOAD_SSIZE(it->it_index);
if (index < 0) {
return NULL;
}
PyListObject *seq = it->it_seq;
assert(PyList_Check(seq));
PyObject *item = list_get_item_ref(seq, index);
if (item != NULL) {
STORE_SSIZE(it->it_index, index - 1);