Fix reference leaks in list/dict.clear

python · JukkaL · Apr 16, 2026 · Apr 16, 2026 · Apr 16, 2026 · 0e662a79e967c7ec30482e0bbdc2f64fcb540598
commit 0e662a79e967c7ec30482e0bbdc2f64fcb540598
diff --git a/mypyc/lib-rt/dict_ops.c b/mypyc/lib-rt/dict_ops.c
@@ -274,6 +274,7 @@ char CPyDict_Clear(PyObject *dict) {
         if (res == NULL) {
             return 0;
         }
+        Py_DECREF(res);
     }
     return 1;
 }

diff --git a/mypyc/lib-rt/list_ops.c b/mypyc/lib-rt/list_ops.c
@@ -37,6 +37,7 @@ char CPyList_Clear(PyObject *list) {
         if (res == NULL) {
             return 0;
         }
+        Py_DECREF(res);
     }
     return 1;
 }