rust/src/test/run-pass/argv.rs

fn main(args: ~[~str]) {
    let vs: ~[~str] = ~[~"hi", ~"there", ~"this", ~"is", ~"a", ~"vec"];
    let vvs: ~[~[~str]] = ~[args, vs];
    for vvs.each |vs| { for vs.each |s| { log(debug, s); } }
}