SendPort + ReceivePort changes:

tests/standalone/src/io/DirectoryTest.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.
 //
 // Directory listing test.
 
 #import("dart:io");
 #import("dart:isolate");
 
 class DirectoryTest {
@@ skipping 430 matching lines @@
     Expect.throws(new Directory(location).createTempSync,
                   (e) => e is DirectoryException);
   }
 }
 
 
 testCreateTempError() {
   var location = illegalTempDirectoryLocation();
   if (location == null) return;
 
-  var resultPort = new ReceivePort.singleShot();
+  var resultPort = new ReceivePort();
   resultPort.receive((String message, ignored) {
+      resultPort.close();
       Expect.equals("error", message);
     });
 
   Directory dir = new Directory(location);
   dir.onError = (error) { resultPort.toSendPort().send("error"); };
   dir.createTemp(() => resultPort.toSendPort().send("success"));
 }
 
 
 main() {
   DirectoryTest.testMain();
   NestedTempDirectoryTest.testMain();
   testCreateTempErrorSync();
   testCreateTempError();
 }