src/share/classes/sun/reflect/generics/scope/DummyScope.java

@@ -36,11 +36,11 @@
  * other kind of scope.
  */
 public class DummyScope implements Scope {
     // Caches the unique instance of this class; instances contain no data
     // so we can use the singleton pattern
-    private static DummyScope singleton = new DummyScope();
+    private static final DummyScope singleton = new DummyScope();
 
     // constructor is private to enforce use of factory method
     private DummyScope(){}
 
     /**