【发布时间】：2019-09-12 10:37:54
【问题描述】：
我为 web 和 dart sdk 安装了颤振。添加到路径 bin 文件夹。跑flutter pub global activate webdev和flutter pub upgrade，但输入webdev serve后总是报错”：
[SEVERE] Failed to snapshot build script .dart_tool/build/entrypoint/build.dart.
[SEVERE] This is likely caused by a misconfigured builder definition.
[SEVERE] /C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/builder_info.dart:43:34: Error: Method not found: 'MapFieldInfo.map'. _addField(MapFieldInfo<K, V>.map(name, tagNumber, index, PbFieldType.M, ^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:45:9: Error: '_mapEntryBuilderInfo' isn't an instance field of this class. _mapEntryBuilderInfo = null { ^^^^^^^^^^^^^^^^^^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:61:9: Error: '_mapEntryBuilderInfo' isn't an instance field of this class. _mapEntryBuilderInfo = null; ^^^^^^^^^^^^^^^^^^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:68:9: Error: '_mapEntryBuilderInfo' isn't an instance field of this class. _mapEntryBuilderInfo = null { ^^^^^^^^^^^^^^^^^^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:82:12: Error: '_mapEntryBuilderInfo' isn't an instance field of this class. this._mapEntryBuilderInfo]) ^^^^^^^^^^^^^^^^^^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:199:9: Error: Superclass has no constructor named 'FieldInfo._'. : super._( ^^^^^/C:/flutter/.pub-cache/hosted/pub.dartlang.org/protobuf-0.13.16/lib/src/protobuf/field_info.dart:195:21: Error: Final field '_mapEntryBuilderInfo' is not initialized.Try to#7 _CommandRunner.runCommand (package:webdev/src/webdev_command_runner.dart:38:24)
<asynchronous suspension>
#8 CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:112:25)
#9 new Future.sync (dart:async/future.dart:224:31)
#10 CommandRunner.run (package:args/command_runner.dart:112:14)
#11 run (package:webdev/src/webdev_command_runner.dart:19:56)
#12 main (file:///C:/flutter/.pub-cache/hosted/pub.dartlang.org/webdev-2.5.1/bin/webdev.dart:17:22)
<asynchronous suspension>
#13 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:303:32)
#14 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)
扑医生：
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.9.1+hotfix.2, on Microsoft Windows [Version 10.0.18362.356], locale ru-RU)
[X] Android toolchain - develop for Android devices
X Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/setup/#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
You may also want to add it to your PATH environment variable.
[!] Android Studio (not installed)
[√] VS Code (version 1.38.1)
[!] Connected device
! No devices available
! Doctor found issues in 3 categories.
pubspec.yaml：
name: addd
description: An app built using Flutter for web
environment:
# You must be using Flutter >=1.5.0 or Dart >=2.3.0
sdk: '>=2.3.0 <3.0.0'
dependencies:
flutter_web: any
flutter_web_ui: any
dev_dependencies:
build_runner: ^1.5.0
build_web_compilers: ^2.1.0
pedantic: ^1.7.0
dependency_overrides:
flutter_web:
git:
url: https://github.com/flutter/flutter_web
path: packages/flutter_web
flutter_web_ui:
git:
url: https://github.com/flutter/flutter_web
path: packages/flutter_web_ui
如何解决？
UPD。添加了更多细节（颤振医生和 pubspec.yaml）
【问题讨论】：
-
您能运行
flutter doctor并提供您的 pubspec.yaml 文件吗？ -
尝试在dependens中使用protobuf-0.13.15
-
@Nuts 已添加，但我认为颤振医生不会有帮助。
-
你可以运行
pub run build_runner clean或者pub cache repair -
@Nuts 没有修复