AccessDeniedException deleting sass.bat

[s-and-r]

Using sass-embedded-bundled 3.2.0:

BundledCompilerFactory is unable to delete the temporary folder (AccessDeniedException) because sass.bat has a read-only attribute.

I'm not sure why; none of the other files in that folder have a read-only attribute. I suspect it was added by anti-virus software somehow. We're using a product from Sophos, it's company managed.

As far as I can tell after running some live expressions with a debugger, all that's needed to prevent the error is a file.toFile().setWritable(true) call above the Files.delete(file) line in DirCleaner.

[larsgrefer]

The missing write permissions on the bat script file are actually my fault.

After this was fixed, it now fails to delete the dart.exe file, which is a more difficult problem.
The exe file cannot be deleted, because the process is still running.

It seems to be a well-known bug on Windows that stopping process (the bat file) does not stop its subprocesses (the dart.exe)

• https://stackoverflow.com/q/5879791/3574494
• Gradle doesn't stop forked processes gradle/gradle#7603