1 files changed, 5 insertions, 0 deletions
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 4fe8dace59..b07ee8ec32 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2009,6 +2009,11 @@ builtin_sum(PyObject *self, PyObject *args)
             }
             /* Either overflowed or is not an int. Restore real objects and process normally */
             result = PyLong_FromLong(i_result);
+            if (result == NULL) {
+                Py_DECREF(item);
+                Py_DECREF(iter);
+                return NULL;
+            }
             temp = PyNumber_Add(result, item);
             Py_DECREF(result);
             Py_DECREF(item);