This looks better now: $ perl6-m foo Could not open foo. Failed to open file: no such file or directory $ perl6-p foo Could not open foo. Unable to open filehandle from path 'foo': No such file or directory(2) $ perl6-j foo Could not open foo. java.nio.file.NoSuchFileException: foo
So, I'd say closable with tests. (Though I don't know how a good test would look like.)
