For safety, replace a tuple entry before decreffing it.
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 4dca054..68e176f 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -1591,6 +1591,7 @@
PyObject *result = lz->result;
PyObject *it;
PyObject *item;
+ PyObject *olditem;
if (tuplesize == 0)
return NULL;
@@ -1604,8 +1605,9 @@
Py_DECREF(result);
return NULL;
}
- Py_DECREF(PyTuple_GET_ITEM(result, i));
+ olditem = PyTuple_GET_ITEM(result, i);
PyTuple_SET_ITEM(result, i, item);
+ Py_DECREF(olditem);
}
} else {
result = PyTuple_New(tuplesize);