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gh-134119: Fix crash from calling next() on exhausted template iterator (#134120)

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Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Jelle Zijlstra 2025-05-17 12:23:19 -07:00 • committed by GitHub
parent 84914ad0e5
commit fc7f4c3666
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Objects/templateobject.c
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@ -23,6 +23,9 @@ templateiter_next(PyObject *op)
if (self->from_strings) {
item = PyIter_Next(self->stringsiter);
self->from_strings = 0;
if (item == NULL) {
return NULL;
}
if (PyUnicode_GET_LENGTH(item) == 0) {
Py_SETREF(item, PyIter_Next(self->interpolationsiter));
self->from_strings = 1;