raw_copy_file changes external file attributes of directory to regular file #954

fn raw_copy_dir() {
    let mut input = {
        let mut b = zip::ZipWriter::new(std::io::Cursor::new(Vec::new()));
        b.add_directory("dir", zip::write::FileOptions::DEFAULT)
            .unwrap();
        b.finish_into_readable().unwrap()
    };
    let mut copied = {
        let mut b = zip::ZipWriter::new(std::io::Cursor::new(Vec::new()));
        b.raw_copy_file(input.by_index(0).unwrap()).unwrap();
        b.finish_into_readable().unwrap()
    };

    {
        let f = copied.by_index(0).unwrap();
        println!("{:o}", f.unix_mode().unwrap()); // changes to 0o100755
    }
}