Very simple version of Isolates.

tests/compiler/dart2js_extra/isolate2_test.dart

 // Copyright (c) 2012, 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 program for testing that exceptions in other isolates bring down
 // the program.
 // TODO(7769): Remove this test when
 // tests/isolate/isolate2_negative_test passes.
 
 library isolate2_negative_test;
 import 'dart:isolate';
 
-void entry() {
-  throw "foo";
+void entry(SendPort replyTo) {
+  throw "foo";  /// 01: runtime error
+  replyTo.send("done");
 }
 
 main() {
-  SendPort port = spawnFunction(entry);
-  port.receive((msg) {});
+  var port = new ReceivePort();
+  Isolate.spawn(entry, port.sendPort);
+  port.first;
 }