Display isolate message queue in Observatory debugger

runtime/vm/service/vmservice.dart

Index: runtime/vm/service/vmservice.dart
diff --git a/runtime/vm/service/vmservice.dart b/runtime/vm/service/vmservice.dart
index a627ed740fe13fd62d80d9ec25cf4f0d217bdd8c..c7a29f1655be9c9fbeed3659a8fe4fbba36fd222 100644
--- a/runtime/vm/service/vmservice.dart
+++ b/runtime/vm/service/vmservice.dart
@@ -68,7 +68,8 @@ class VMService extends MessageRouter {
   void _exit() {
     isolateLifecyclePort.close();
     scriptLoadPort.close();

[turnidge, 2015/05/04 17:47:13]

Add a comment so I don't undo this fix again!

[Cutch, 2015/05/04 19:56:52]

Done.

-    for (var client in clients) {
+    var clientsList = clients.toList();
+    for (var client in clientsList) {
       client.close();
     }
     // Call embedder shutdown hook after the internal shutdown.