Catch unexpected http uri error in service isolate

runtime/bin/vmservice/server.dart

 // Copyright (c) 2013, 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.
 
 part of vmservice_io;
 
 class WebSocketClient extends Client {
   static const int PARSE_ERROR_CODE = 4000;
   static const int BINARY_MESSAGE_ERROR_CODE = 4001;
   static const int NOT_MAP_ERROR_CODE = 4002;
@@ skipping 128 matching lines @@
     var resource = Resource.resources[path];
     if (resource != null) {
       // Serving up a static resource (e.g. .css, .html, .png).
       request.response.headers.contentType =
           ContentType.parse(resource.mimeType);
       request.response.add(resource.data);
       request.response.close();
       return;
     }
     // HTTP based service request.
-    var client = new HttpRequestClient(request, _service);
-    var message = new Message.fromUri(client, request.uri);
-    client.onMessage(null, message);
+    try {
+      var client = new HttpRequestClient(request, _service);
+      var message = new Message.fromUri(client, request.uri);
+      client.onMessage(null, message);
+    } catch (e) {
+      print('Unexpected error processing HTTP request uri: '
+            '${request.uri}\n$e\n');
+      rethrow;
+    }
+
   }
 
   Future startup() {
     if (_server != null) {
       // Already running.
       return new Future.value(this);
     }
 
     // Startup HTTP server.
     return HttpServer.bind(_ip, _port).then((s) {
@@ skipping 45 matching lines @@
       print('Could not shutdown Observatory HTTP server:\n$e\n$st\n');
       _notifyServerState("", 0);
       return this;
     });
   }
 
 }
 
 void _notifyServerState(String ip, int port)
     native "VMServiceIO_NotifyServerState";