diff -r 86e61729f754 -r a93a52b33474 rt/emul/mini/src/main/java/java/lang/Class.java
--- a/rt/emul/mini/src/main/java/java/lang/Class.java	Sun Nov 23 21:55:46 2014 +0100
+++ b/rt/emul/mini/src/main/java/java/lang/Class.java	Tue Jan 20 17:23:12 2015 +0100
@@ -1858,5 +1858,10 @@
     @JavaScriptOnly(name = "bck2BrwsrThrwrbl", value = "c.bck2BrwsrCnvrt__Ljava_lang_Object_2Ljava_lang_Object_2")
     private static void bck2BrwsrCnvrtVM() {
     }
+
+    @Exported
+    @JavaScriptOnly(name = "castEx", value = "function() { throw vm.java_lang_ClassCastException(true); }")
+    private static void castEx() {
+    }
     
 }