Flutter Tool crashed unexpectedly when running "flutter test", Deletion failed, path = 'build\unit_test_assets', errno = 145 #33536
Description
command
flutter test test\notifications\fcm_notification_test.dart
exception
FileSystemException: FileSystemException: Deletion failed, path = 'build\unit_test_assets' (OS Error: Das Verzeichnis ist nicht leer.
, errno = 145)
"Das Verzeichnis ist nicht leer." means "the directory is not empty".
#0 _Directory._deleteSync (dart:io/directory_impl.dart:206:7)
#1 FileSystemEntity.deleteSync (dart:io/file_system_entity.dart:466:47)
#2 ForwardingFileSystemEntity.deleteSync (package:file/src/forwarding/forwarding_file_system_entity.dart:72:16)
#3 writeBundle (package:flutter_tools/src/bundle.dart:232:15)
<asynchronous suspension>
#4 TestCommand._buildTestAsset (package:flutter_tools/src/commands/test.dart:242:11)
<asynchronous suspension>
#5 TestCommand.runCommand (package:flutter_tools/src/commands/test.dart:130:13)
<asynchronous suspension>
#6 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:142:29)
<asynchronous suspension>
#7 _rootRun (dart:async/zone.dart:1124:13)
#8 _CustomZone.run (dart:async/zone.dart:1021:19)
#9 _runZoned (dart:async/zone.dart:1516:10)
#10 runZoned (dart:async/zone.dart:1463:12)
#11 AppContext.run (package:flutter_tools/src/base/context.dart:141:18)
<asynchronous suspension>
#12 FastFlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:780:20)
#13 CommandRunner.runCommand (package:args/command_runner.dart:196:27)
<asynchronous suspension>
#14 FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:396:21)
<asynchronous suspension>
#15 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:142:29)
<asynchronous suspension>
#16 _rootRun (dart:async/zone.dart:1124:13)
#17 _CustomZone.run (dart:async/zone.dart:1021:19)
#18 _runZoned (dart:async/zone.dart:1516:10)
#19 runZoned (dart:async/zone.dart:1463:12)
#20 AppContext.run (package:flutter_tools/src/base/context.dart:141:18)
<asynchronous suspension>
#21 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:356:19)
<asynchronous suspension>
#22 CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:111:29)
#23 new Future.sync (dart:async/future.dart:224:31)
#24 CommandRunner.run (package:args/command_runner.dart:111:11)
#25 FlutterCommandRunner.run (package:flutter_tools/src/runner/flutter_command_runner.dart:242:18)
#26 run.<anonymous closure> (package:flutter_tools/runner.dart:60:20)
<asynchronous suspension>
#27 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:142:29)
<asynchronous suspension>
#28 _rootRun (dart:async/zone.dart:1124:13)
#29 _CustomZone.run (dart:async/zone.dart:1021:19)
#30 _runZoned (dart:async/zone.dart:1516:10)
#31 runZoned (dart:async/zone.dart:1463:12)
#32 AppContext.run (package:flutter_tools/src/base/context.dart:141:18)
<asynchronous suspension>
#33 runInContext (package:flutter_tools/src/context_runner.dart:50:24)
<asynchronous suspension>
#34 run (package:flutter_tools/runner.dart:51:10)
#35 main (package:flutter_tools/executable.dart:60:9)
<asynchronous suspension>
#36 main (file:///E:/Development/flutter/packages/flutter_tools/bin/flutter_tools.dart:8:3)
#37 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:298:32)
#38 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:171:12)
flutter doctor
�[32m[✓]�[39m Flutter (Channel beta, v1.5.4-hotfix.2, on Microsoft Windows [Version 10.0.17134.765], locale de-DE)
�[32m•�[39m Flutter version 1.5.4-hotfix.2 at E:\Development\flutter
�[32m•�[39m Framework revision 7a4c33425d (4 weeks ago), 2019-04-29 11:05:24 -0700
�[32m•�[39m Engine revision 52c7a1e849
�[32m•�[39m Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)
�[32m[✓]�[39m Android toolchain - develop for Android devices (Android SDK version 28.0.3)
�[32m•�[39m Android SDK at E:\Development\Android_SDK
�[32m•�[39m Android NDK location not configured (optional; useful for native profiling support)
�[32m•�[39m Platform android-28, build-tools 28.0.3
�[32m•�[39m Java binary at: E:\Development\Android Studio\jre\bin\java
�[32m•�[39m Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
�[32m•�[39m All Android licenses accepted.
�[32m[✓]�[39m Android Studio (version 3.2)
�[32m•�[39m Android Studio at E:\Development\Android Studio
�[32m•�[39m Flutter plugin version 29.1.1
�[32m•�[39m Dart plugin version 181.5656
�[32m•�[39m Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
�[33m[!]�[39m Connected device
�[33m!�[39m No devices available
�[33m!�[39m Doctor found issues in 1 category.