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[3.10] gh-101765: Fix SystemError / segmentation fault in iter __reduce__ when internal access of builtins.__dict__ exhausts the iterator (GH-101769) (#102229)

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(cherry picked from commit 54dfa14c5a)
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Ionite 2023-02-24 22:50:53 -05:00 • committed by GitHub
parent 3e80d21b76
commit 9f472f81bc
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8 changed files with 141 additions and 24 deletions
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11
Objects/bytesobject.c
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@ -3146,11 +3146,16 @@ static PyObject *
striter_reduce(striterobject *it, PyObject *Py_UNUSED(ignored))
{
_Py_IDENTIFIER(iter);
PyObject *iter = _PyEval_GetBuiltinId(&PyId_iter);
/* _PyEval_GetBuiltinId can invoke arbitrary code,
* call must be before access of iterator pointers.
* see issue #101765 */
if (it->it_seq != NULL) {
return Py_BuildValue("N(O)n", _PyEval_GetBuiltinId(&PyId_iter),
it->it_seq, it->it_index);
return Py_BuildValue("N(O)n", iter, it->it_seq, it->it_index);
} else {
return Py_BuildValue("N(())", _PyEval_GetBuiltinId(&PyId_iter));
return Py_BuildValue("N(())", iter);
}
}