Do not do global optimizations on fields and parameters when invokeOn is enabled.

sdk/lib/_internal/lib/js_helper.dart

Index: sdk/lib/_internal/lib/js_helper.dart
===================================================================
--- sdk/lib/_internal/lib/js_helper.dart	(revision 27000)
+++ sdk/lib/_internal/lib/js_helper.dart	(working copy)
@@ -175,7 +175,7 @@
     }
     var method = JS('var', '#[#]', receiver, name);
     if (JS('String', 'typeof #', method) == 'function') {
-      if (JS('bool', '#[#] == false', method, JS_GET_NAME("REFLECTABLE"))) {
+      if (JS('bool', '!#[#]', method, JS_GET_NAME("REFLECTABLE"))) {

[ahe, 2013/09/02 09:46:49]

      String reflectableProperty = JS_GET_NAME("REFLECTABLE");
      bool hasReflectableProperty =
          JS('bool', '# in #', reflectableProperty, method);
      if (hasReflectableProperty &&
          JS('bool', '!#[#]', method, reflectableProperty)) {
        throwInvalidReflectionError(memberName);
      }

[ngeoffray, 2013/09/02 09:54:08]

That worked. Thanks Peter.

         throwInvalidReflectionError(memberName);
       }
       return new CachedInvocation(method, isIntercepted, interceptor);