--- old/src/share/classes/sun/reflect/generics/tree/BottomSignature.java	2014-11-28 16:33:49.836611026 +0300
+++ new/src/share/classes/sun/reflect/generics/tree/BottomSignature.java	2014-11-28 16:33:49.652611032 +0300
@@ -28,7 +28,7 @@
 import sun.reflect.generics.visitor.TypeTreeVisitor;
 
 public class BottomSignature implements FieldTypeSignature {
-    private static BottomSignature singleton = new BottomSignature();
+    private static final BottomSignature singleton = new BottomSignature();
 
     private BottomSignature(){}