--- old/src/share/classes/sun/reflect/generics/tree/DoubleSignature.java	2014-11-27 09:55:10.754563908 +0300
+++ new/src/share/classes/sun/reflect/generics/tree/DoubleSignature.java	2014-11-27 09:55:10.430729979 +0300
@@ -29,7 +29,7 @@
 
 /** AST that represents the type double. */
 public class DoubleSignature implements BaseType {
-    private static DoubleSignature singleton = new DoubleSignature();
+    private static final DoubleSignature singleton = new DoubleSignature();
 
     private DoubleSignature(){}