// In order to avoid killing a directory before killing the files
    // inside, sort the longest paths first.
    let mut dead: Vec<_> = dead.iter().collect();
    dead.sort_by(|a, b| {
        let cmp = b.1.1.cmp(&a.1.1);
        use std::cmp::Ordering;
        if let Ordering::Equal = cmp {
            b.cmp(&a)
        } else {
            cmp
        }
    });