diff -r 81a7a4fcaf46 -r aa2e9630b6d5 rt/emul/mini/src/main/java/java/lang/Class.java
--- a/rt/emul/mini/src/main/java/java/lang/Class.java	Sun Apr 24 14:17:09 2016 +0200
+++ b/rt/emul/mini/src/main/java/java/lang/Class.java	Thu Apr 28 07:13:00 2016 +0200
@@ -1870,10 +1870,10 @@
     )
     static native Object clone(Object self) throws CloneNotSupportedException;
 
-    @JavaScriptOnly(name = "toJS", value = "function(v) {\n"
+    @JavaScriptOnly(name = "toJS", value = "function convToJS(v) {\n"
         + "  if (v === null) return null;\n"
         + "  if (Object.prototype.toString.call(v) === '[object Array]') {\n"
-        + "    return vm.org_apidesign_bck2brwsr_emul_lang_System(false).convArray__Ljava_lang_Object_2Ljava_lang_Object_2(v);\n"
+        + "    return vm.org_apidesign_bck2brwsr_emul_lang_System(false).convArray__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2(v, convToJS);\n"
         + "  }\n"
         + "  if (v instanceof Date) return v;\n"
         + "  return v.valueOf();\n"