bpo-35356: Fix a possible reference leak in nis.maps(). (GH-10808)

diff --git a/Modules/nismodule.c b/Modules/nismodule.c
index bc6796c278caaa42cc160b21de1964b2ff99b464..a24978e0686705de3785ae5d718323c6b68a8f03 100644 (file)
--- a/Modules/nismodule.c
+++ b/Modules/nismodule.c
@@ -412,6 +412,7 @@ nis_maps (PyObject *self, PyObject *args, PyObject *kwdict)
         PyObject *str = PyUnicode_FromString(maps->map);
         if (!str || PyList_Append(list, str) < 0)
         {
+            Py_XDECREF(str);
             Py_DECREF(list);
             list = NULL;
             break;