Very simple version of Isolates.

tests/standalone/issue14236_source.dart

Index: tests/standalone/issue14236_source.dart
diff --git a/tests/standalone/issue14236_source.dart b/tests/standalone/issue14236_source.dart
index 4d2dc693280fcf31c87aa6ef758c3681b9d7f539..3b9e1641c9d0a9db6f50e7fdc5cab3c5e38a50b1 100644
--- a/tests/standalone/issue14236_source.dart
+++ b/tests/standalone/issue14236_source.dart
@@ -13,16 +13,18 @@ import 'dart:isolate';
 import "package:expect/expect.dart";
 
 /*
-test() {
-  port.receive((msg, reply) => reply.send(msg));
+test(SendPort replyTo) {
+  replyTo.send("from Isolate");
 }
 
 main() {
+  asyncStart();
   ReceivePort port = new ReceivePort();
-  port.receive((msg, reply) => port.close());
-
-  SendPort s = spawnFunction(test);
-  s.send('hi', port.toSendPort());
+  Isolate.spawn(test, port.sendPort);
+  port.first.then((msg) {
+    Expect.equals("from Isolate", msg);
+    asyncEnd();
+  });
 }
 */