Overriding fields is now permissable.

tests/language/src/Field3aNegativeTest.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// Dart test to catch that we do not override fields.
+// Dart test to catch error reporting bugs in class fields declarations.
 
-class A {
-  var a_;
-  var b_;
-}
-
-class B extends A {
-  var b_;
-  var c_;
-}
-
-class FieldNegativeTest {
-  static testMain() {
-  }
+class C {
+  final a;  // illegal field declaration - must be initialized
 }
 
 main() {
-  FieldNegativeTest.testMain();
+  var val = new C();
+  Expect.equals(val.a, 0);
 }