我刚刚开始研究AngularDart教程的第6章（第1部分，创建编辑配方组件） - 到目前为止，我已复制了视图组件，并确保将所有相关详细信息添加到web / main.dart并具有检查过的班级名称等没问题，但是我无法找到为什么会抛出以下错误：
Build error:
Transform _Serial on tutorial|test/main_test.dart threw error: The null object does not have a getter 'arguments'.
NoSuchMethodError: method not found: 'arguments'
Receiver: null
Arguments: []
dart:core-patch/object_patch.dart 42 Object._noSuchMethod
dart:core-patch/object_patch.dart 45 Object.noSuchMethod
package:angular/tools/source_metadata_extractor.dart 188 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 180 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 176 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass
package:angular/tools/source_metadata_extractor.dart 165 DirectiveMetadataCollectingAstVisitor._walkSuperclassChain
package:angular/tools/source_metadata_extractor.dart 156 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 120 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration
package:analyzer/src/generated/ast.dart 3494 ClassDeclaration.accept
package:analyzer/src/generated/ast.dart 19457 NodeList.accept
package:analyzer/src/generated/ast.dart 4261 CompilationUnit.visitChildren
package:analyzer/src/generated/ast.dart 14170 RecursiveAstVisitor.visitCompilationUnit
package:analyzer/src/generated/ast.dart 4211 CompilationUnit.accept
package:angular/tools/source_metadata_extractor.dart 207 DirectiveMetadataCollectingVisitor.call
dart:core/iterable.dart 217 Iterable.forEach
package:angular/tools/transformer/expression_generator.dart 155 _LibrarySourceCrawler.crawl
package:angular/tools/source_metadata_extractor.dart 27 SourceMetadataExtractor.gatherDirectiveInfo
package:angular/tools/transformer/expression_generator.dart 43 ExpressionGenerator.applyResolver
package:code_transformers/src/resolvers.dart 113 Transformer&ResolverTransformer.applyToEntryPoints.<fn>.<fn>
dart:async/future.dart 118 Future.Future.<fn>
dart:async-patch/timer_patch.dart 16 Timer._createTimer.<fn>
dart:isolate-patch/timer_impl.dart 385 _Timer._runTimers
dart:isolate-patch/timer_impl.dart 414 _Timer._handleMessage
dart:isolate-patch/isolate_patch.dart 148 _RawReceivePortImpl._handleMessage
dart:core Object.noSuchMethod
package:angular/tools/source_metadata_extractor.dart 188 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 180 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 176 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass
package:angular/tools/source_metadata_extractor.dart 165 DirectiveMetadataCollectingAstVisitor._walkSuperclassChain
package:angular/tools/source_metadata_extractor.dart 156 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 120 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration
package:analyzer/src/generated/ast.dart 3494 ClassDeclaration.accept
package:analyzer/src/generated/ast.dart 19457 NodeList.accept
package:analyzer/src/generated/ast.dart 4261 CompilationUnit.visitChildren
package:analyzer/src/generated/ast.dart 14170 RecursiveAstVisitor.visitCompilationUnit
package:analyzer/src/generated/ast.dart 4211 CompilationUnit.accept
package:angular/tools/source_metadata_extractor.dart 207 DirectiveMetadataCollectingVisitor.call
dart:core Iterable.forEach
package:angular/tools/transformer/expression_generator.dart 155 _LibrarySourceCrawler.crawl
package:angular/tools/source_metadata_extractor.dart 27 SourceMetadataExtractor.gatherDirectiveInfo
package:angular/tools/transformer/expression_generator.dart 43 ExpressionGenerator.applyResolver
package:code_transformers/src/resolvers.dart 113 Transformer&ResolverTransformer.applyToEntryPoints.<fn>.<fn>
Build error:
Transform _Serial on tutorial|web/main.dart threw error: The null object does not have a getter 'arguments'.
NoSuchMethodError: method not found: 'arguments'
Receiver: null
Arguments: []
dart:core-patch/object_patch.dart 42 Object._noSuchMethod
dart:core-patch/object_patch.dart 45 Object.noSuchMethod
package:angular/tools/source_metadata_extractor.dart 188 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 180 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 176 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass
package:angular/tools/source_metadata_extractor.dart 165 DirectiveMetadataCollectingAstVisitor._walkSuperclassChain
package:angular/tools/source_metadata_extractor.dart 156 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration.<fn>
dart:collection/list.dart 63 Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 120 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration
package:analyzer/src/generated/ast.dart 3494 ClassDeclaration.accept
package:analyzer/src/generated/ast.dart 19457 NodeList.accept
package:analyzer/src/generated/ast.dart 4261 CompilationUnit.visitChildren
package:analyzer/src/generated/ast.dart 14170 RecursiveAstVisitor.visitCompilationUnit
package:analyzer/src/generated/ast.dart 4211 CompilationUnit.accept
package:angular/tools/source_metadata_extractor.dart 207 DirectiveMetadataCollectingVisitor.call
dart:core/iterable.dart 217 Iterable.forEach
package:angular/tools/transformer/expression_generator.dart 155 _LibrarySourceCrawler.crawl
package:angular/tools/source_metadata_extractor.dart 27 SourceMetadataExtractor.gatherDirectiveInfo
package:angular/tools/transformer/expression_generator.dart 43 ExpressionGenerator.applyResolver
package:code_transformers/src/resolvers.dart 113 Transformer&ResolverTransformer.applyToEntryPoints.<fn>.<fn>
dart:async/future.dart 118 Future.Future.<fn>
dart:async-patch/timer_patch.dart 16 Timer._createTimer.<fn>
dart:isolate-patch/timer_impl.dart 385 _Timer._runTimers
dart:isolate-patch/timer_impl.dart 414 _Timer._handleMessage
dart:isolate-patch/isolate_patch.dart 148 _RawReceivePortImpl._handleMessage
dart:core Object.noSuchMethod
package:angular/tools/source_metadata_extractor.dart 188 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 180 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 176 DirectiveMetadataCollectingAstVisitor._extractMappingsFromClass
package:angular/tools/source_metadata_extractor.dart 165 DirectiveMetadataCollectingAstVisitor._walkSuperclassChain
package:angular/tools/source_metadata_extractor.dart 156 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration.<fn>
dart:collection Object&ListMixin.forEach
package:angular/tools/source_metadata_extractor.dart 120 DirectiveMetadataCollectingAstVisitor.visitClassDeclaration
package:analyzer/src/generated/ast.dart 3494 ClassDeclaration.accept
package:analyzer/src/generated/ast.dart 19457 NodeList.accept
package:analyzer/src/generated/ast.dart 4261 CompilationUnit.visitChildren
package:analyzer/src/generated/ast.dart 14170 RecursiveAstVisitor.visitCompilationUnit
package:analyzer/src/generated/ast.dart 4211 CompilationUnit.accept
package:angular/tools/source_metadata_extractor.dart 207 DirectiveMetadataCollectingVisitor.call
dart:core Iterable.forEach
package:angular/tools/transformer/expression_generator.dart 155 _LibrarySourceCrawler.crawl
package:angular/tools/source_metadata_extractor.dart 27 SourceMetadataExtractor.gatherDirectiveInfo
package:angular/tools/transformer/expression_generator.dart 43 ExpressionGenerator.applyResolver
package:code_transformers/src/resolvers.dart 113 Transformer&ResolverTransformer.applyToEntryPoints.<fn>.<fn>
任何帮助将不胜感激！ ：）