从Dart编辑器设置新安装的Dart Polymer项目时，出现以下错误：
--- 5:47:24 PM Starting pub serve : testing ---
Loading source assets...
Loading polymer transformers...
Serving testing web on http://localhost:8080
in ShutdownIsolate: Unhandled exception:
Uncaught Error: 'package:stack_trace/src/trace.dart': malformed type: line 107 pos 16: type 'LazyTrace' is not loaded
return new LazyTrace(() => new Trace.parse(trace.toString()));
^
type error.
Stack Trace:
#0 Trace.Trace.from (package:stack_trace/src/trace.dart:107:16)
#1 Chain.Chain.forTrace (package:stack_trace/src/chain.dart:121:53)
#2 CrossIsolateException.serialize (package:$pub/serialize/exception.dart:46:43)
#3 serializeException (package:$pub/serialize/exception.dart:88:43)
#4 respond.<anonymous closure> (package:$pub/serialize.dart:164:34)
#5 _RootZone.runBinary (dart:async/zone.dart:1156)
#6 _Future._propagateToListeners.handleError (dart:async/future_impl.dart:524)
#7 _Future._propagateToListeners (dart:async/future_impl.dart:582)
#8 _Future._propagateToListeners.handleWhenCompleteCallback.<anonymous closure> (dart:async/future_impl.dart:563)
#9 _RootZone.runUnary (dart:async/zone.dart:1151)
#10 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:496)
#11 _Future._propagateToListeners (dart:async/future_impl.dart:579)
#12 _Future._completeWithValue (dart:async/future_impl.dart:339)
#13 _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:401)
#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)
pubspec.lock：
# Generated by pub
# See http://pub.dartlang.org/doc/glossary.html#lockfile
packages:
analyzer:
description: analyzer
source: hosted
version: "0.22.4"
args:
description: args
source: hosted
version: "0.12.1"
barback:
description: barback
source: hosted
version: "0.15.2+2"
browser:
description: browser
source: hosted
version: "0.10.0+2"
code_transformers:
description: code_transformers
source: hosted
version: "0.2.3+1"
collection:
description: collection
source: hosted
version: "1.1.0"
csslib:
description: csslib
source: hosted
version: "0.11.0+2"
html5lib:
description: html5lib
source: hosted
version: "0.12.0"
logging:
description: logging
source: hosted
version: "0.9.2"
observe:
description: observe
source: hosted
version: "0.12.1+1"
path:
description: path
source: hosted
version: "1.3.0"
polymer:
description: polymer
source: hosted
version: "0.12.2+1"
polymer_expressions:
description: polymer_expressions
source: hosted
version: "0.12.0+1"
pool:
description: pool
source: hosted
version: "1.0.1"
smoke:
description: smoke
source: hosted
version: "0.2.1+1"
source_maps:
description: source_maps
source: hosted
version: "0.10.0"
source_span:
description: source_span
source: hosted
version: "1.0.2"
stack_trace:
description: stack_trace
source: hosted
version: "1.1.1"
string_scanner:
description: string_scanner
source: hosted
version: "0.1.2"
template_binding:
description: template_binding
source: hosted
version: "0.12.1"
utf:
description: utf
source: hosted
version: "0.9.0+1"
watcher:
description: watcher
source: hosted
version: "0.9.3"
web_components:
description: web_components
source: hosted
version: "0.5.0+1"
yaml:
description: yaml
source: hosted
version: "2.1.0"
pubspec.yaml
name: testing
description: A sample Polymer application
dependencies:
polymer: ">=0.12.0 <0.13.0"
transformers:
- polymer:
entry_points: web/testing.html
飞镖版：
➜ testing dart --version
Dart VM version: 1.7.2 (Tue Oct 14 06:58:25 2014) on "macos_x64"
现在我没有在stack_trace包中的任何地方看到LazyTrace类。有没有人在这个问题上有经验？