Log from felt_windows.bat build -w

log.txt

C:\src\engine\src [master]> .\flutter\lib\web_ui\dev\felt_windows.bat build -w
"Running \`pub get\` in 'engine/src/flutter/web_sdk/web_engine_tester'"
Resolving dependencies...
Got dependencies!
"Running \`pub get\` in 'engine/src/flutter/lib/web_ui'"
Resolving dependencies...
Got dependencies!
Running gn...
Generating GN files in: out\host_debug_unopt
Generating Visual Studio projects took 4102ms
Done. Made 686 targets from 237 files in 12146ms
Running ninja (with default ninja parallelization)...
ninja: Entering directory `C:\src\engine\src\out\host_debug_unopt'
[1/1] Regenerating ninja files
[50/167] COPY dart.exe dart-sdk/bin/dart.exe
FAILED: dart-sdk/bin/dart.exe
C:/Users/Study/Documents/chromium/depot_tools/bootstrap-3_8_0_chromium_8_bin/python/bin/python.exe gyp-win-tool recursive-mirror dart.exe dart-sdk/bin/dart.exe
Traceback (most recent call last):
  File "gyp-win-tool", line 323, in <module>
    sys.exit(main(sys.argv[1:]))
  File "gyp-win-tool", line 29, in main
    exit_code = executor.Dispatch(args)
  File "gyp-win-tool", line 71, in Dispatch
    return getattr(self, method)(*args[1:])
  File "gyp-win-tool", line 105, in ExecRecursiveMirror
    os.unlink(dest)
WindowsError: [Error 5] Access is denied: 'dart-sdk/bin/dart.exe'
[53/167] ACTION //third_party/dart/utils/kernel-service:kernel-service_snapshot(//build/toolchain/win:clang_x64)
ninja: build stopped: subcommand failed.
Initial build done!
Watching directory: lib/
- [modify] src\engine\text\measurement.dart
Running gn...
Generating GN files in: out\host_debug_unopt
Generating Visual Studio projects took 199ms
Done. Made 686 targets from 237 files in 7531ms
Running ninja (with default ninja parallelization)...
ninja: Entering directory `C:\src\engine\src\out\host_debug_unopt'
[1/1] Regenerating ninja files
- [modify] src\engine\text\measurement.dart
[47/171] COPY dart.exe dart-sdk/bin/dart.exe
FAILED: dart-sdk/bin/dart.exe
C:/Users/Study/Documents/chromium/depot_tools/bootstrap-3_8_0_chromium_8_bin/python/bin/python.exe gyp-win-tool recursive-mirror dart.exe dart-sdk/bin/dart.exe
Traceback (most recent call last):
  File "gyp-win-tool", line 323, in <module>
    sys.exit(main(sys.argv[1:]))
  File "gyp-win-tool", line 29, in main
    exit_code = executor.Dispatch(args)
  File "gyp-win-tool", line 71, in Dispatch
    return getattr(self, method)(*args[1:])
  File "gyp-win-tool", line 105, in ExecRecursiveMirror
    os.unlink(dest)
WindowsError: [Error 5] Access is denied: 'dart-sdk/bin/dart.exe'
[52/167] LINK ./android_external_view_embedder_unittests.exe
ninja: build stopped: subcommand failed.
Running gn...
Generating GN files in: out\host_debug_unopt
Generating Visual Studio projects took 180ms
Done. Made 686 targets from 237 files in 6554ms
Running ninja (with default ninja parallelization)...
ninja: Entering directory `C:\src\engine\src\out\host_debug_unopt'
[1/1] Regenerating ninja files
[48/167] COPY dart.exe dart-sdk/bin/dart.exe
FAILED: dart-sdk/bin/dart.exe
C:/Users/Study/Documents/chromium/depot_tools/bootstrap-3_8_0_chromium_8_bin/python/bin/python.exe gyp-win-tool recursive-mirror dart.exe dart-sdk/bin/dart.exe
Traceback (most recent call last):
  File "gyp-win-tool", line 323, in <module>
    sys.exit(main(sys.argv[1:]))
  File "gyp-win-tool", line 29, in main
    exit_code = executor.Dispatch(args)
  File "gyp-win-tool", line 71, in Dispatch
    return getattr(self, method)(*args[1:])
  File "gyp-win-tool", line 105, in ExecRecursiveMirror
    os.unlink(dest)
WindowsError: [Error 5] Access is denied: 'dart-sdk/bin/dart.exe'
[53/167] ACTION //third_party/dart/utils/kernel-service:kernel-service_snapshot(//build/toolchain/win:clang_x64)
ninja: build stopped: subcommand failed.
*** Done! ***