Handle constants that mix eager and deferred types.

dart/tests/lib/async/deferred/deferred_constant_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file

[ngeoffray, 2013/05/14 07:17:38]

Could you provide a test that fails too, when the eager code tries to access
some constant that is not loaded yet.

[ahe, 2013/05/14 10:01:24]

http://dartbug.com/10640

+// 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.
+
+import "package:expect/expect.dart";
+import 'dart:async';
+
+@lazy
+import 'deferred_constant_library.dart';
+
+const lazy = const DeferredLibrary('deferred_constant_library');
+
+main() {
+  print('unittest-suite-wait-for-done');
+
+  lazy.load().then((_) {
+    Expect.listEquals(const [const Constant(42)], [new Constant(42)]);
+    print('unittest-suite-success');
+  });
+}