在编译dart时查找错误源_Dart_Dart Polymer

在编译dart时查找错误源

dart

在编译dart时查找错误源,dart,dart-polymer,Dart,Dart Polymer,我正在编译一个用dart和polymer编写的网站，遇到了一个错误（请参阅下面的堆栈跟踪，很长，但不是很有用）。如堆栈跟踪所示，当polymer transformer尝试从html导入（在MY_APP.html中）内联聚合物元素定义时，发生了错误如果我的_APP.html中只有2个自定义元素，我会注释掉其中一个，看看问题是否仍然存在，问题是我有大约20个自定义元素，一个一个地尝试它们既无聊又耗时，有没有办法确定导致问题的自定义元素谢谢堆栈跟踪： ... (OMITTED) Build e

我正在编译一个用dart和polymer编写的网站，遇到了一个错误（请参阅下面的堆栈跟踪，很长，但不是很有用）。如堆栈跟踪所示，当polymer transformer尝试从html导入（在MY_APP.html中）内联聚合物元素定义时，发生了错误

如果我的_APP.html中只有2个自定义元素，我会注释掉其中一个，看看问题是否仍然存在，问题是我有大约20个自定义元素，一个一个地尝试它们既无聊又耗时，有没有办法确定导致问题的自定义元素

谢谢

堆栈跟踪：

... (OMITTED)
Build error:
Transform polymer (ImportInliner) on MY_PACKAGE_NAME|web/MY_APP.html threw error: The null object does not have a method '[]'.

NoSuchMethodError : method not found: '[]'
Receiver: null
Arguments: [1]
dart:core-patch/object_patch.dart 45                                          Object.noSuchMethod
dart:core/uri.dart 124                                                        Uri.Uri._fromMatch
dart:core/uri.dart 121                                                        Uri.parse
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 177:24  _UrlNormalizer._newUrl
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 169:41  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50               TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23  _UrlNormalizer.visitElement
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50               TreeVisitor.visit
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49               TreeVisitor.visitChildren
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48               TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 32:52               TreeVisitor.visitDocument
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 16:52               TreeVisitor.visit
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 148:48  ImportInliner._collectImportedDocuments.<fn>.<fn>
dart:async/zone.dart 717                                                      _rootRunUnary
dart:async/zone.dart 854                                                      _RootZone.runUnary
dart:async/future_impl.dart 439                                               _Future._propagateToListeners.handleValueCallback
dart:async/future_impl.dart 522                                               _Future._propagateToListeners
dart:async/future_impl.dart 303                                               _Future._complete
dart:async/future.dart 286                                                    Future.forEach.nextElement
dart:async/zone.dart 717                                                      _rootRunUnary
dart:async/zone.dart 854                                                      _RootZone.runUnary
dart:async/future_impl.dart 439                                               _Future._propagateToListeners.handleValueCallback
dart:async/future_impl.dart 522                                               _Future._propagateToListeners
dart:async/future_impl.dart 303                                               _Future._complete
dart:async/future_impl.dart 354                                               _Future._asyncComplete.<fn>
dart:async/schedule_microtask.dart 23                                         _asyncRunCallbackLoop
dart:async/schedule_microtask.dart 32                                         _asyncRunCallback
dart:isolate-patch/isolate_patch.dart 119                                     _RawReceivePortImpl._handleMessage

../../home/MY_USER_NAME/dart/dart/sdk/lib/_internal/pub/lib/src/barback/load_transformers.dart 560  _call.<fn>
dart:isolate                                                                                 _RawReceivePortImpl._handleMessage
... (OMITTED)

。。。（略）
生成错误：
MY_PACKAGE_NAME | web/MY_APP.html上的Transform polymer（ImportInliner）抛出错误：null对象没有方法“[]”。
NoSuchMethodError:找不到方法：“[]”
收件人：空
论点：[1]
dart:core patch/object\u patch.dart 45 object.noSuchMethod
dart:core/uri.dart 124 uri.uri.\u frommach
dart:core/uri.dart 121 uri.parse
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 177:24标准化程序
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 169:41
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 173:23
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.参观
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 24:49树人，探视孩子
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 32:52 TreeVisitor.visitDocument
http://127.0.0.1:36562/packages/html5lib/dom_parsing.dart 16:52 TreeVisitor.参观
http://127.0.0.1:36562/packages/polymer/src/build/import_inliner.dart 148:48导入行。\u收集导入的文档。。
dart:async/zone.dart 717\u rootRunUnary
dart:async/zone.dart 854\u RootZone.runUnary
dart:async/future\u impl.dart 439\u future.\u propagateToListeners.handleValueCallback
dart:async/future\u impl.dart 522\u future.\u传播到侦听器
dart:async/future\u impl.dart 303\u future.\u完成
dart:async/future.dart 286 future.forEach.nextElement
dart:async/zone.dart 717\u rootRunUnary
dart:async/zone.dart 854\u RootZone.runUnary
dart:async/future\u impl.dart 439
<a href="/blah/{{observableMap['my_key']}}">blah</a>

<a href="{{'/blah/' + observableMap['my_key']}}">blah</a>