我正在使用IntelliJ IDEA开发Dart客户端应用程序13.昨天，我将Polymer.dart升级到0.10.0-pre.2。从那时起，事情就变得棘手了。我已降级到0.9.5，因为我不再需要新功能，但我仍然遇到同样的问题。当我从IntelliJ在Dartium中启动我的应用程序时，出现以下错误：
GET http://localhost:63342/webatara/web/packages/observe/src/bindable.dart 404 (Not Found)
An error occurred loading file: package:observe/src/bindable.dart
GET http://localhost:63342/webatara/web/packages/observe/src/observer_transform.dart 404 (Not Found)
An error occurred loading file: package:observe/src/observer_transform.dart
GET http://localhost:63342/webatara/web/packages/template_binding/src/mustache_tokens.dart 404 (Not Found)
An error occurred loading file: package:template_binding/src/mustache_tokens.dart
GET http://localhost:63342/webatara/web/packages/smoke/smoke.dart 404 (Not Found)
An error occurred loading file: package:smoke/smoke.dart
我不知道引用这些东西是什么。
$ grep -r bindable.dart packages web ~/.pub-cache
$
我已尝试删除./packages，./pubspec.lock和~/.pub-cache，但我遇到了同样的问题。我已尝试升级到13.1 EAP并更新Dart插件，但这并没有帮助。这是我的pubspec.yaml：
name: webatara
description: A sample Polymer application
dependencies:
barback: any
browser: any
polymer: any
transformers:
- polymer:
entry_points: web/index.html
threadsafe: yes
结果是pubspec.lock：
# Generated by pub
# See http://pub.dartlang.org/doc/glossary.html#lockfile
packages:
analyzer:
description: analyzer
source: hosted
version: "0.10.5"
args:
description: args
source: hosted
version: "0.9.0"
barback:
description: barback
source: hosted
version: "0.11.1"
browser:
description: browser
source: hosted
version: "0.9.1"
collection:
description: collection
source: hosted
version: "0.9.1"
custom_element:
description: custom_element
source: hosted
version: "0.9.2"
html5lib:
description: html5lib
source: hosted
version: "0.9.2"
html_import:
description: html_import
source: hosted
version: "0.9.0"
logging:
description: logging
source: hosted
version: "0.9.1+1"
mutation_observer:
description: mutation_observer
source: hosted
version: "0.9.0"
observe:
description: observe
source: hosted
version: "0.9.3"
path:
description: path
source: hosted
version: "1.0.0"
polymer:
description: polymer
source: hosted
version: "0.9.5"
polymer_expressions:
description: polymer_expressions
source: hosted
version: "0.9.1"
shadow_dom:
description: shadow_dom
source: hosted
version: "0.9.2"
source_maps:
description: source_maps
source: hosted
version: "0.9.0"
stack_trace:
description: stack_trace
source: hosted
version: "0.9.2"
template_binding:
description: template_binding
source: hosted
version: "0.9.1"
unmodifiable_collection:
description: unmodifiable_collection
source: hosted
version: "0.9.2+1"
utf:
description: utf
source: hosted
version: "0.9.0"
yaml:
description: yaml
source: hosted
version: "0.9.0"