diff -r c78acf6c2f3e -r fcf89720ae71 src/share/classes/javax/tools/StandardLocation.java
--- a/src/share/classes/javax/tools/StandardLocation.java	Mon Dec 10 12:10:50 2012 +0000
+++ b/src/share/classes/javax/tools/StandardLocation.java	Mon Dec 10 16:21:26 2012 +0000
@@ -97,7 +97,7 @@
         return locations.get(name);
     }
     //where
-        private static ConcurrentMap<String,Location> locations
+        private static final ConcurrentMap<String,Location> locations
             = new ConcurrentHashMap<String,Location>();
 
     public String getName() { return name(); }