Issue #18772: fix the gdb plugin after the set implementation changes
diff --git a/Objects/object.c b/Objects/object.c
index 81d6d4b..0561e09 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -22,7 +22,7 @@
     o = _PyDict_Dummy();
     if (o != NULL)
         total -= o->ob_refcnt;
-    o = _PySet_Dummy();
+    o = _PySet_Dummy;
     if (o != NULL)
         total -= o->ob_refcnt;
     return total;