--- a/jdk/src/java.base/share/classes/java/util/Locale.java	Fri Jun 17 04:35:09 2016 -0700
+++ b/jdk/src/java.base/share/classes/java/util/Locale.java	Fri Jun 17 21:42:38 2016 +0900
@@ -2888,7 +2888,7 @@
                 throw new IllegalArgumentException("weight=" + weight);
             }
 
-            range = range.toLowerCase();
+            range = range.toLowerCase(Locale.ROOT);
 
             // Do syntax check.
             boolean isIllFormed = false;