运行flutter项目报错-package:front_end/src/fasta/builder/type_builder.dart:392:29
报错内容
运行一个flutter项目突然报错:
Crash when compiling null, at character offset null: Null check operator used on a null value #0 InferableTypeBuilderMixin.type (package:front_end/src/fasta/builder/type_builder.dart:392:29)
全部报错信息如下:
/Volumes/huc/opt/fvm/current/bin/cache/dart-sdk/bin/dart --enable-asserts --pause_isolates_on_start --enable-vm-service:60501 /Volumes/huc/58housecommonLib/fair/example/lib/main.dart
The Dart VM service is listening on http://127.0.0.1:60501/i-DncDKjZNw=/
The Dart DevTools debugger and profiler is available at: http://127.0.0.1:60501/i-DncDKjZNw=/devtools/#/?uri=ws://127.0.0.1:60501/i-DncDKjZNw=/ws
Crash when compiling null,
at character offset null:
Null check operator used on a null value
#0 InferableTypeBuilderMixin.type (package:front_end/src/fasta/builder/type_builder.dart:392:29)
#1 InferableTypeBuilder.inferType (package:front_end/src/fasta/builder/omitted_type_builder.dart:155:12)
#2 SourceLoader.performTopLevelInference (package:front_end/src/fasta/source/source_loader.dart:2358:19)
#3 KernelTarget.buildOutlines.<anonymous closure> (package:front_end/src/fasta/kernel/kernel_target.dart:532:14)
<asynchronous suspension>
#4 withCrashReporting (package:front_end/src/fasta/crash.dart:122:12)
<asynchronous suspension>
#5 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:407:33)
<asynchronous suspension>
#6 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:68:50)
<asynchronous suspension>
#7 IncrementalCompilerWrapper.compileInternal (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:345:28)
<asynchronous suspension>
#8 Compiler.compile.<anonymous closure> (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:221:45)
<asynchronous suspension>
#9 _processLoadRequest (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:914:37)
<asynchronous suspension>
#0 InferableTypeBuilderMixin.type (package:front_end/src/fasta/builder/type_builder.dart:392:29)
#1 InferableTypeBuilder.inferType (package:front_end/src/fasta/builder/omitted_type_builder.dart:155:12)
#2 SourceLoader.performTopLevelInference (package:front_end/src/fasta/source/source_loader.dart:2358:19)
#3 KernelTarget.buildOutlines.<anonymous closure> (package:front_end/src/fasta/kernel/kernel_target.dart:532:14)
<asynchronous suspension>
#4 withCrashReporting (package:front_end/src/fasta/crash.dart:122:12)
<asynchronous suspension>
#5 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:407:33)
<asynchronous suspension>
#6 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:68:50)
<asynchronous suspension>
#7 IncrementalCompilerWrapper.compileInternal (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:345:28)
<asynchronous suspension>
#8 Compiler.compile.<anonymous closure> (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:221:45)
<asynchronous suspension>
#9 _processLoadRequest (org-dartlang-kernel-service:///pkg/vm/bin/kernel_service.dart:914:37)
<asynchronous suspension>
Process finished with exit code 252
检查配置
我运行的是fair 项目下的example工程
这是一个flutter app项目
所以这里建错target了
按照下面target 重新创建运行target
创建flutter app target 如下
重新点击debug 启动项目,
ok成功了
总结
本次记录这次fair项目example 实例运行过程,其中走了一些弯路,比如检查dart sdk 版本是不是之前有手动修改过,导致dart-sdk front-end 编译系统出问题了。 还切换了3.3.0 3.3.2 3.3.7等多个版本,删除~/.pub-cache,删除$FLUTTER_ROOT/bin/cache等重置flutter 环境都是报错, 最后发现是入口创建错了。 算是一个小失误,记录一下
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