我刚刚进入了一个基于flutter的现有项目，而在尝试构建它时，却遇到了这个错误。
另一个同事没有问题。
在运行运行器脚本期间，它因以下错误而失败：
You have hit a bug in build_runner
Please file an issue with reproduction steps at https://github.com/dart-lang/build/issues
NoSuchMethodError: The getter 'futureDynamicType' was called on null.
Receiver: null
Tried calling: futureDynamicType
dart:core Object.noSuchMethod
package:analyzer/src/dart/element/element.dart 7053:40 LibraryElementImpl.createLoadLibraryFunctionForLibrary
package:analyzer/src/dart/element/element.dart 6903:9 LibraryElementImpl.createLoadLibraryFunction
package:analyzer/src/summary/resynthesize.dart 363:24 SummaryResynthesizer.getLibraryElement.<fn>
dart:collection _LinkedHashMapMixin.putIfAbsent
package:analyzer/src/summary/resynthesize.dart 351:36 SummaryResynthesizer.getLibraryElement
package:analyzer/src/summary/resynthesize.dart 414:20 SummaryResynthesizer._buildTypeProvider
package:analyzer/src/summary/resynthesize.dart 202:5 new SummaryResynthesizer
package:analyzer/src/summary/package_bundle_reader.dart 154:9 new StoreBasedSummaryResynthesizer
package:analyzer/src/dart/analysis/library_context.dart 100:27 new LibraryContext
package:analyzer/src/dart/analysis/driver.dart 1626:29 AnalysisDriver._createLibraryContext
package:analyzer/src/dart/analysis/driver.dart 1570:26 AnalysisDriver._computeUnitElement
package:analyzer/src/dart/analysis/driver.dart 1170:34 AnalysisDriver.performWork
package:analyzer/src/dart/analysis/driver.dart 2188:24 AnalysisDriverScheduler._run
package:analyzer/src/dart/analysis/driver.dart 2118:5 AnalysisDriverScheduler.start
package:build_resolvers/src/analysis_driver.dart 54:13 analysisDriver
package:build_resolvers/src/resolver.dart 138:18 new AnalyzerResolvers
package:build_runner_core/src/generate/options.dart 132:19 BuildOptions.create
package:build_runner/src/generate/build.dart 84:36 build
package:build_runner/src/entrypoint/build.dart 28:24 BuildCommand.run
package:args/command_runner.dart 197:27 CommandRunner.runCommand
package:args/command_runner.dart 112:25 CommandRunner.run.<fn>
dart:async new Future.sync
package:args/command_runner.dart 112:14 CommandRunner.run
package:build_runner/src/entrypoint/run.dart 24:31 run
.dart_tool/build/entrypoint/build.dart 22:22 main
pub finished with exit code 1
任何想法会导致什么？我没有碰这个项目。
答案 0 :(得分：1)
我不得不将Flutter的等级从1.10降级到1.9。
答案 1 :(得分：1)