Test case for issue 6108

isolate/illegal_msg_test.dart

Index: isolate/illegal_msg_test.dart
===================================================================
--- isolate/illegal_msg_test.dart	(revision 0)
+++ isolate/illegal_msg_test.dart	(revision 0)
@@ -0,0 +1,32 @@
+// 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.
+
+import 'dart:isolate';
+
+funcFoo(x) => x + 2;
+
+echo() {
+  port.receive((msg, reply) {
+    reply.send("echoing ${msg(1)}}");
+  });
+}
+
+main() {
+  var snd = spawnFunction(echo);
+  var caught_exception = false;
+  try {
+    snd.send(funcFoo, port.toSendPort());
+  } catch (e) {
+    caught_exception = true;
+  }
+
+  if (caught_exception) {
+    port.close();
+  } else {
+    port.receive((msg, reply) {
+      print("from worker ${msg}");
+    });
+  }
+  Expect.isTrue(caught_exception);
+}