gh-47146: Fix reference counting in _testcapi.structmember initializer (GH-106862)

diff --git a/Modules/_testcapi/structmember.c b/Modules/_testcapi/structmember.c
index 8522dc962efa40e5750bd021a7ecc1691509f375..096eaecd40855f2c6780a86e7f7f3e0acc2a3153 100644 (file)
--- a/Modules/_testcapi/structmember.c
+++ b/Modules/_testcapi/structmember.c
@@ -193,7 +193,7 @@ _PyTestCapi_Init_Structmember(PyObject *m)
     if (res < 0) {
         return -1;
     }
-    res = PyModule_AddObject(
+    res = PyModule_AddObjectRef(
         m,
         "_test_structmembersType_OldAPI",
         (PyObject *)&test_structmembersType_OldAPI);