gh-104190: fix ubsan crash (#104191)

diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index ae70a33eb4d1ed6bcda4888e82e125fade873f7e..376f04f23e324a39fa097859c245997a5b0e0b40 100644 (file)
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -4221,7 +4221,7 @@ PyInit__testcapi(void)
         return NULL;
     }
     int ret = PyModule_AddType(m, (PyTypeObject*)ObjExtraData_Type);
-    Py_DECREF(&ObjExtraData_Type);
+    Py_DECREF(ObjExtraData_Type);
     if (ret < 0) {
         return NULL;
     }