我重新设置了flutter，但示例应用程序无法编译。 Flutter医生还显示一切设置正确。
以下是错误：
Launching lib/main.dart on HTC Desire 820G PLUS dual sim in debug mode...
Initializing gradle... 1.1s
Resolving dependencies... 2.0s
Unhandled exception:
Crash when compiling package:hello_world/main.dart,
at character offset null:
null:4314624: indicated size does not match file size at
#0 BinaryBuilder.fail (package:kernel/binary/ast_from_binary.dart:98:5)
#1 BinaryBuilder._indexComponents (package:kernel/binary/ast_from_binary.dart:425:15)
#2 BinaryBuilder.readComponent (package:kernel/binary/ast_from_binary.dart:453:36)
#3 ProcessedOptions.loadComponent (package:front_end/src/base/processed_options.dart:391:10)
#4 ProcessedOptions.loadSdkSummary (package:front_end/src/base/processed_options.dart:329:32)
<asynchronous suspension>
#5 generateKernelInternal.<anonymous closure> (package:front_end/src/kernel_generator_impl.dart:71:36)
<asynchronous suspension>
#6 withCrashReporting (package:front_end/src/fasta/crash.dart:122:24)
<asynchronous suspension>
#7 generateKernelInternal (package:front_end/src/kernel_generator_impl.dart:58:10)
<asynchronous suspension>
#8 kernelForProgram.<anonymous closure> (package:front_end/src/api_prototype/kernel_generator.dart:48:28)
<asynchronous suspension>
#9 CompilerContext.runWithOptions.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:134:20)
<asynchronous suspension>
#10 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:122:46)
#11 new Future.sync (dart:async/future.dart:224:31)
#12 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:122:19)
#13 _rootRun (dart:async/zone.dart:1124:13)
#14 _CustomZone.run (dart:async/zone.dart:1021:19)
#15 _runZoned (dart:async/zone.dart:1516:10)
#16 runZoned (dart:async/zone.dart:1463:12)
#17 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:121:12)
#18 CompilerContext.runWithOptions (package:front_end/src/fasta/compiler_context.dart:132:10)
#19 kernelForProgram (package:front_end/src/api_prototype/kernel_generator.dart:47:32)
<asynchronous suspension>
#20 compileToKernel (package:vm/kernel_front_end.dart:309:27)
<asynchronous suspension>
#21 FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:359:56)
#22 new Future.<anonymous closure> (dart:async/future.dart:176:37)
#23 _rootRun (dart:async/zone.dart:1120:38)
#24 _CustomZone.run (dart:async/zone.dart:1021:19)
#25 _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#26 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#27 _rootRun (dart:async/zone.dart:1124:13)
#28 _CustomZone.run (dart:async/zone.dart:1021:19)
#29 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#30 Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:21:15)
#31 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:382:19)
#32 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:416:5)
#33 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)
#0 BinaryBuilder.fail (package:kernel/binary/ast_from_binary.dart:98:5)
#1 BinaryBuilder._indexComponents (package:kernel/binary/ast_from_binary.dart:425:15)
#2 BinaryBuilder.readComponent (package:kernel/binary/ast_from_binary.dart:453:36)
#3 ProcessedOptions.loadComponent (package:front_end/src/base/processed_options.dart:391:10)
#4 ProcessedOptions.loadSdkSummary (package:front_end/src/base/processed_options.dart:329:32)
<asynchronous suspension>
#5 generateKernelInternal.<anonymous closure> (package:front_end/src/kernel_generator_impl.dart:71:36)
<asynchronous suspension>
#6 withCrashReporting (package:front_end/src/fasta/crash.dart:122:24)
<asynchronous suspension>
#7 generateKernelInternal (package:front_end/src/kernel_generator_impl.dart:58:10)
<asynchronous suspension>
#8 kernelForProgram.<anonymous closure> (package:front_end/src/api_prototype/kernel_generator.dart:48:28)
<asynchronous suspension>
#9 CompilerContext.runWithOptions.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:134:20)
<asynchronous suspension>
#10 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:122:46)
#11 new Future.sync (dart:async/future.dart:224:31)
#12 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:122:19)
#13 _rootRun (dart:async/zone.dart:1124:13)
#14 _CustomZone.run (dart:async/zone.dart:1021:19)
#15 _runZoned (dart:async/zone.dart:1516:10)
#16 runZoned (dart:async/zone.dart:1463:12)
#17 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:121:12)
#18 CompilerContext.runWithOptions (package:front_end/src/fasta/compiler_context.dart:132:10)
#19 kernelForProgram (package:front_end/src/api_prototype/kernel_generator.dart:47:32)
<asynchronous suspension>
#20 compileToKernel (package:vm/kernel_front_end.dart:309:27)
<asynchronous suspension>
#21 FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:359:56)
#22 new Future.<anonymous closure> (dart:async/future.dart:176:37)
#23 _rootRun (dart:async/zone.dart:1120:38)
#24 _CustomZone.run (dart:async/zone.dart:1021:19)
#25 _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#26 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#27 _rootRun (dart:async/zone.dart:1124:13)
#28 _CustomZone.run (dart:async/zone.dart:1021:19)
#29 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#30 Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:21:15)
#31 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:382:19)
#32 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:416:5)
#33 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)
Compiler failed on /home/sagar/Documents/aviabird/hello_world/lib/main.dart
FAILURE: Build failed with an exception.
* Where:
Script '/home/sagar/development/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 665
* What went wrong:
Execution failed for task ':app:compileflutterBuildDebugArm'.
> Process 'command '/home/sagar/development/flutter/bin/flutter'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 2s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done 3.0s
Gradle task assembleDebug failed with exit code 1
Flutter Doctor输出：
[✓] Flutter（频道稳定，v1.7.8 + hotfix.4，在Linux上，语言环境为en_IN） •/ home / sagar / development / flutter中的Flutter版本1.7.8 + hotfix.4 •Framework版本20e59316b8（2周前），2019-07-18 20:04:33 -0700 •引擎修订费001c93f •Dart 2.4.0版
[✓] Android工具链-为Android设备开发（Android SDK版本29.0.1） •位于/ home / sagar / Android / Sdk的Android SDK •未配置Android NDK位置（可选；对本机性能分析支持很有用） •平台android-29，构建工具29.0.1 •Java二进制文件，位于：/ home / sagar / development / android-studio / jre / bin / java •Java版本OpenJDK运行时环境（内部版本1.8.0_152-release-1343-b16-5323222） •接受所有Android许可。
[✓] Android Studio（3.4版） •位于/ home / sagar / development / android-studio的Android Studio •Flutter插件版本38.1.1 •Dart插件版本183.6270 •Java版本OpenJDK运行时环境（内部版本1.8.0_152-release-1343-b16-5323222）
[✓] VS代码（1.36.1版） •VS Code位于/ usr / share / code •Flutter扩展版本3.3.0
[✓]已连接设备（1个可用） •192.168.56.101:5555•192.168.56.101:5555•android-x86•Android 7.1.1（API 25）
•找不到问题！
答案 0 :(得分：4)
您的flutter安装的缓存文件夹似乎已损坏。
您可以在终端命令行中执行以下步骤：
rm -rf /Users/XXX/flutter/bin/cache（XXX是Mac用户）
flutter doctor -v
flutter run --release
p / s：link
答案 1 :(得分：0)
也有类似的问题。在我的情况下，其中一个导入类型。如果导入文件，则在一个导入中使用“ F”而不是“ f”。只需仔细检查所有输入（大小写，空格，下划线等）即可。