src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeObject.java

*** 497,507 ****
      @Function(attributes = Attribute.NOT_ENUMERABLE)
      public static Object toLocaleString(final Object self) {
          final Object obj = JSType.toScriptObject(self);
          if (obj instanceof ScriptObject) {
              final InvokeByName toStringInvoker = getTO_STRING();
!             final ScriptObject sobj = (ScriptObject)self;
              try {
                  final Object toString = toStringInvoker.getGetter().invokeExact(sobj);
  
                  if (Bootstrap.isCallable(toString)) {
                      return toStringInvoker.getInvoker().invokeExact(toString, sobj);
--- 497,507 ----
      @Function(attributes = Attribute.NOT_ENUMERABLE)
      public static Object toLocaleString(final Object self) {
          final Object obj = JSType.toScriptObject(self);
          if (obj instanceof ScriptObject) {
              final InvokeByName toStringInvoker = getTO_STRING();
!             final ScriptObject sobj = (ScriptObject)obj;
              try {
                  final Object toString = toStringInvoker.getGetter().invokeExact(sobj);
  
                  if (Bootstrap.isCallable(toString)) {
                      return toStringInvoker.getInvoker().invokeExact(toString, sobj);