Issue 5440. Fixes for exceptions during resolving

samples/chat/chat_server_lib.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.
 
 #library("chat_server");
 #import("dart:io");
 #import("dart:isolate");
 #import("dart:json");
 #import("dart:math");
 
@@ skipping 239 matching lines @@
   static const STARTED = 1;
   static const STOPPING = 2;
   static const STOPPED = 3;
   static const ERROR = 4;
 
   ChatServerStatus(this._state, this._message);
   ChatServerStatus.starting() : _state = STARTING;
   ChatServerStatus.started(this._port) : _state = STARTED;
   ChatServerStatus.stopping() : _state = STOPPING;
   ChatServerStatus.stopped() : _state = STOPPED;
-  ChatServerStatus.error([this._error]) : _state = ERROR;
+  ChatServerStatus.error2([this._error]) : _state = ERROR;
 
   bool get isStarting => _state == STARTING;
   bool get isStarted => _state == STARTED;
   bool get isStopping => _state == STOPPING;
   bool get isStopped => _state == STOPPED;
   bool get isError => _state == ERROR;
 
   int get state => _state;
   String get message {
     if (_message != null) return _message;
@@ skipping 413 matching lines @@
     }
   }
 
   int _timeRange;
   List<int> _buckets;
   int _currentBucket;
   int _currentBucketTime;
   num _bucketTimeRange;
   int _sum;
 }