当 运行 没有在 windows 上发布时出现 webdev 错误
webdev error when ran without pub on windows
我在 Windows 10 上进行 AngularDart 开发。我最近在使用 webdev 时遇到了奇怪的行为。我必须像这样 运行 webdev：
C:\Users\galankus>C:\tools\dart-sdk\bin\pub.bat global run webdev
A tool to develop Dart web projects.
Usage: webdev <command> [arguments]
Global options:
-h, --help Print this usage information.
Available commands:
build Run builders to build a package.
help Display help information for webdev.
serve Run a local web development server and a file system watcher that re-builds on changes.
Run "webdev help <command>" for more information about a command.
如果我尝试直接 运行 它，下面是我得到的。关于如何 debug/fix 有什么想法吗？
C:\Users\galankus>webdev
Crash when formatting: [Encoding] Unable to decode bytes as UTF-8.
RangeError (index): Invalid value: Not in range 0..271500, inclusive: 271792
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
Crash when compiling file:///C:/Users/galankus/AppData/Roaming/Pub/Cache/global_packages/webdev/bin/webdev.dart.snapshot,
at character offset 264110:
RangeError (index): Invalid value: Not in range 0..271500, inclusive: 271792
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
编辑：下面没有任何改变，我仍然得到上面的错误。
C:\Users\galankus>pub global activate webdev
Package webdev is currently active at version 0.2.3.
Resolving dependencies...
+ args 1.4.3
+ charcode 1.1.1
+ collection 1.14.10
+ io 0.3.2+1
+ meta 1.1.5
+ path 1.6.1
+ pub_semver 1.4.1
+ source_span 1.4.0
+ stack_trace 1.9.2
+ string_scanner 1.0.2
+ webdev 0.2.3
+ yaml 2.1.14
Precompiling executables...
Precompiled webdev:bin\webdev.
Installed executable webdev.
Activated webdev 0.2.3.
这是最近的 Dart 版本中的一个错误，已经修复。
更新 Dart 和全局激活的 webdev 包应该可以修复它
要更新全局激活的包，只需再次激活它：
pub global activate webdev
使用此命令激活 WebDev
dart pub global activate webdev
我在 Windows 10 上进行 AngularDart 开发。我最近在使用 webdev 时遇到了奇怪的行为。我必须像这样 运行 webdev：
C:\Users\galankus>C:\tools\dart-sdk\bin\pub.bat global run webdev
A tool to develop Dart web projects.
Usage: webdev <command> [arguments]
Global options:
-h, --help Print this usage information.
Available commands:
build Run builders to build a package.
help Display help information for webdev.
serve Run a local web development server and a file system watcher that re-builds on changes.
Run "webdev help <command>" for more information about a command.
如果我尝试直接 运行 它，下面是我得到的。关于如何 debug/fix 有什么想法吗？
C:\Users\galankus>webdev
Crash when formatting: [Encoding] Unable to decode bytes as UTF-8.
RangeError (index): Invalid value: Not in range 0..271500, inclusive: 271792
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
Crash when compiling file:///C:/Users/galankus/AppData/Roaming/Pub/Cache/global_packages/webdev/bin/webdev.dart.snapshot,
at character offset 264110:
RangeError (index): Invalid value: Not in range 0..271500, inclusive: 271792
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
#0 _StringBase.[] (dart:core/runtime/libstring_patch.dart:233:55)
#1 Source.getTextLine (package:kernel/ast.dart:5772:42)
#2 getSourceLine (package:front_end/src/fasta/messages.dart:27:9)
#3 format (package:front_end/src/fasta/command_line_reporting.dart:80:27)
#4 ProcessedOptions.format (package:front_end/src/base/processed_options.dart:206:32)
#5 ProcessedOptions.report (package:front_end/src/base/processed_options.dart:215:22)
#6 CompilerContext.report (package:front_end/src/fasta/compiler_context.dart:67:13)
#7 Loader.addMessage (package:front_end/src/fasta/loader.dart:258:20)
#8 Loader.addCompileTimeError (package:front_end/src/fasta/loader.dart:207:5)
#9 LibraryBuilder.addCompileTimeError (package:front_end/src/fasta/builder/library_builder.dart:89:12)
#10 SourceLoader.tokenize (package:front_end/src/fasta/source/source_loader.dart:174:17)
<asynchronous suspension>
#11 SourceLoader.buildOutline (package:front_end/src/fasta/source/source_loader.dart:192:26)
<asynchronous suspension>
#12 Loader.buildOutlines (package:front_end/src/fasta/loader.dart:176:13)
<asynchronous suspension>
#13 KernelTarget.buildOutlines (package:front_end/src/fasta/kernel/kernel_target.dart:237:20)
<asynchronous suspension>
#14 IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:232:24)
<asynchronous suspension>
#15 CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:46)
#16 new Future.sync (dart:async/future.dart:222:31)
#17 CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:118:19)
#18 _rootRun (dart:async/zone.dart:1126:13)
#19 _CustomZone.run (dart:async/zone.dart:1023:19)
#20 _runZoned (dart:async/zone.dart:1518:10)
#21 runZoned (dart:async/zone.dart:1465:12)
#22 CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:117:12)
#23 IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:102:20)
<asynchronous suspension>
#24 IncrementalCompiler.compile (package:vm/incremental_compiler.dart:38:44)
<asynchronous suspension>
#25 IncrementalCompilerWrapper.compileInternal (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:158:28)
<asynchronous suspension>
#26 Compiler.compile.<anonymous closure> (file:///E:/b/build/slave/dart-sdk-windows-dev/build/sdk/pkg/vm/bin/kernel_service.dart:132:39)
#27 new Future.<anonymous closure> (dart:async/future.dart:174:37)
#28 _rootRun (dart:async/zone.dart:1122:38)
#29 _CustomZone.run (dart:async/zone.dart:1023:19)
#30 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#31 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
#35 Timer._createTimer.<anonymous closure> (dart:async/runtime/libtimer_patch.dart:21:15)
#36 _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#37 _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#38 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
编辑：下面没有任何改变，我仍然得到上面的错误。
C:\Users\galankus>pub global activate webdev
Package webdev is currently active at version 0.2.3.
Resolving dependencies...
+ args 1.4.3
+ charcode 1.1.1
+ collection 1.14.10
+ io 0.3.2+1
+ meta 1.1.5
+ path 1.6.1
+ pub_semver 1.4.1
+ source_span 1.4.0
+ stack_trace 1.9.2
+ string_scanner 1.0.2
+ webdev 0.2.3
+ yaml 2.1.14
Precompiling executables...
Precompiled webdev:bin\webdev.
Installed executable webdev.
Activated webdev 0.2.3.
这是最近的 Dart 版本中的一个错误，已经修复。
更新 Dart 和全局激活的 webdev 包应该可以修复它
要更新全局激活的包，只需再次激活它：
pub global activate webdev
使用此命令激活 WebDev
dart pub global activate webdev