昨晚，我不小心将我的 Dart 编辑器和 SDK 版本从 1.60 更新到了 1.72。意外的意思是我不想在开发时改变我的开发环境，但它发生了。之后，当我尝试“发布获取”时，我看到了这一点：
>--- 7:48:46 AM Running pub get on /Users/Clayvessel/Dropbox/PROJECT/DART/DART_Project/OneViewer_Composite-Viewer/OneViewer_6 ... ---
>Resolving dependencies...
>Got dependencies!
>Precompiling executables...
>Loading source assets...
>Failed to precompile intl:extract_to_arb:
>Unhandled exception:
>Uncaught Error: Failure getting http://localhost:51271/packages/intl/extract_messages.dart: 404 Not Found
>Stack Trace:
>#0 _asyncLoadError (dart:_builtin:285)
>#1 _httpGet.<anonymous closure>.<anonymous closure> (dart:_builtin:228)
>#2 _RootZone.runGuarded (dart:async/zone.dart:1078)
>#3 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:390)
>#4 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399)
>#5 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:290)
>#6 _ForwardingStream._handleDone (dart:async/stream_pipe.dart:110)
>#7 _handleDone (dart:async/stream_pipe.dart:178)
>#8 _RootZone.runGuarded (dart:async/zone.dart:1078)
>#9 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:390)
>#10 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399)
>#11 _DelayedDone.perform (dart:async/stream_impl.dart:614)
>#12 _StreamImplEvents.handleNext (dart:async/stream_impl.dart:711)
>#13 _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:671)
>#14 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
>#15 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
>#16 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
>#17 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
>
>#0 _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:883)
>#1 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
>#2 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
>#3 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
>#4 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
>Failed to precompile intl:generate_from_arb:
>Unhandled exception:
>Uncaught Error: Failure getting http://localhost:51271/packages/intl/extract_messages.dart: 404 Not Found
>Stack Trace:
>#0 _asyncLoadError (dart:_builtin:285)
>#1 _httpGet.<anonymous closure>.<anonymous closure> (dart:_builtin:228)
>#2 _RootZone.runGuarded (dart:async/zone.dart:1078)
>#3 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:390)
>#4 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399)
>#5 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:290)
>#6 _ForwardingStream._handleDone (dart:async/stream_pipe.dart:110)
>#7 _handleDone (dart:async/stream_pipe.dart:178)
>#8 _RootZone.runGuarded (dart:async/zone.dart:1078)
>#9 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:390)
>#10 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399)
>#11 _DelayedDone.perform (dart:async/stream_impl.dart:614)
>#12 _StreamImplEvents.handleNext (dart:async/stream_impl.dart:711)
>#13 _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:671)
>#14 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
>#15 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
>#16 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
>#17 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
>
>#0 _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:883)
>#1 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
>#2 _asyncRunCallback (dart:async/schedule_microtask.dart:48)
>#3 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
>#4 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
具体来说，它抱怨两件事：
导入“包：chart/chart.dart”
将“包：chrome/chrome_app.dart”导入为 chrome
在我更新 Dart SDK 之前，它们工作得很好。在 Dart 编辑器中，它抱怨：URI 的目标不存在
作为 Dart 的新手，我已经进行了详尽的搜索并且没有运气。截止日期快到了，我焦急地寻找解决方案。我在 Mac Book 上开发。但我也有一个 Windows 7 笔记本。他们正在共享 Dropbox 配备的项目文件夹。昨天在此错误发生之前，我将我的 OS X 更新为 Yosemite。在机器更新时，我尝试在 Windows 7 笔记本中为我的项目发布获取和编译 dart2js。它产生了一些错误。所以我删除了我的整个 Dart 文件夹，现在又从 Mac Book 下载了它。我意识到现在 dart 已经更新到 1.7.2。
对此的任何帮助将不胜感激！