Files in folder .dart_tool are not properly updated/managed (Windows10)

[stephan-gruen]

From time to time when I switch to a new dart_sdk version I "hit a bug in build_runner".
Deleting the .dart_tool folder and then recreating an empty one by running pub get (no dependencies are updated) resolves the issue every time.

"D:\dart-sdk\dart-sdk 2.9.0-18.0.dev\bin\pub.bat" global run webdev serve web:53322
[SEVERE] 
[SEVERE] 
[SEVERE] You have hit a bug in build_runner
[SEVERE] Please file an issue with reproduction steps at https://github.com/dart-lang/build/issues
[SEVERE] 
[SEVERE] 
[SEVERE] NoSuchMethodError: Closure call with mismatched arguments: function 'MutablePackageTree.allPackages'
[SEVERE] Receiver: Closure: (_SyncIterator<Package>) => bool
[SEVERE] Tried calling: MutablePackageTree.allPackages()
[SEVERE] Found: MutablePackageTree.allPackages(_SyncIterator<Package>) => bool
[SEVERE] dart:core                                                              _SyncIterable.iterator
[SEVERE] package:package_config/src/package_config_impl.dart 26:36              new SimplePackageConfig
[SEVERE] package:package_config/src/package_config_json.dart 213:10             parsePackageConfigJson
[SEVERE] package:package_config/src/package_config_json.dart 45:10              parsePackageConfigBytes
Unhandled exception:
[SEVERE] package:package_config/src/package_config_io.dart 117:10               readPackageConfigJsonFile
Bad state: Unable to start build daemon.
[SEVERE] package:package_config/src/discovery.dart 109:18                       findPackagConfigInDirectory
#0      _handleDaemonStartup (package:build_daemon/client.dart:82:5)
<asynchronous suspension>
[SEVERE] package:package_config/src/discovery.dart 44:31                        findPackageConfig
#1      BuildDaemonClient.connect (package:build_daemon/client.dart:183:11)
<asynchronous suspension>
[SEVERE] package:package_config/package_config.dart 114:5                       findPackageConfig
#2      connectClient (package:webdev/src/daemon_client.dart:17:23)
[SEVERE] package:build_runner_core/src/package_graph/package_graph.dart 74:15   PackageGraph.forPath
#3      _startBuildDaemon (package:webdev/src/serve/dev_workflow.dart:26:18)
[SEVERE] package:build_runner_core/src/package_graph/package_graph.dart 110:20  PackageGraph.forThisPackage
#4      DevWorkflow.start (package:webdev/src/serve/dev_workflow.dart:191:24)
[SEVERE] package:build_runner/src/entrypoint/run.dart 22:64                     run
#5      ServeCommand.run (package:webdev/src/command/serve_command.dart:101:27)
<asynchronous suspension>
[SEVERE] .dart_tool\build\entrypoint\build.dart 133:22                          main
#6      CommandRunner.runCommand (package:args/command_runner.dart:197:27)
[SEVERE] 
#7      _CommandRunner.runCommand (package:webdev/src/webdev_command_runner.dart:38:24)
#8      CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:112:25)
#9      new Future.sync (dart:async/future.dart:223:31)
#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:/Users/Stephan/AppData/Roaming/Pub/Cache/hosted/pub.dartlang.org/webdev-2.5.9/bin/webdev.dart:17:22)
#13     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32)
#14     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
Dart Webdev terminated

After deleting .dart_tool:

Working dir: D:\dart-apps\webV\gdv\gdv_app
"D:\dart-sdk\dart-sdk 2.9.0-18.0.dev\bin\pub.bat" get
Resolving dependencies...
Overriding the upper bound Dart SDK constraint to <=2.9.0-18.0.dev for the following packages:

dart_internal

To disable this you can set the PUB_ALLOW_PRERELEASE_SDK system environment variable to `false`, or you can silence this message by setting it to `quiet`.
Warning: You are using these overridden dependencies:
! intl 0.16.1
Got dependencies!
Process finished with exit code 0

"D:\dart-sdk\dart-sdk 2.9.0-18.0.dev\bin\pub.bat" global run webdev serve web:53322
[INFO] Building new asset graph completed, took 2.5s
[INFO] Checking for unexpected pre-existing outputs. completed, took 1ms
[INFO] Serving `web` on http://127.0.0.1:53322
[INFO] Generating SDK summary completed, took 5.3s
[INFO] Running build completed, took 1m 48s
[INFO] Caching finalized dependency graph completed, took 735ms
[INFO] Succeeded after 1m 48s with 6508 outputs (14178 actions)
[INFO] ------------------------------------------------------------------------

[jakemac53]

This is an issue with vm snapshots - it should be resolved with dart-lang/sdk#41802