These work for me on revision a35dc85...

with literal fn&

fn main() {
    let mut v = [mut 1, 2,33,51,15,82,123,6,99, 52, 11, 5];
    let mut max = 0;
    
    (v).map(|i|{ 
        
        if *i > max {
            max = *i
        }
        
        io::print(fmt!("%d ", *i));
    });
    io::println(fmt!("max : %d", max));
    let q = 2;
    io::print(fmt!("%b", vec::contains(v,&q)));

    max = 0;

    v.each(fn&(i:&int) -> bool{
        if *i > max {
            max = *i;
        }

        io::print(#fmt("%d ", *i));

        return true;
    });

    io::print(fmt!("max : %d", max));
    io::println("\n");
}

with literal ||{}

fn main() {
    let mut v = [mut 1, 2,33,51,15,82,123,6,99, 52, 11, 5];
    let mut max = 0;
    
    (v).map(|i|{ 
        
        if *i > max {
            max = *i
        }
        
        io::print(fmt!("%d ", *i));
    });
    io::println(fmt!("max : %d", max));
    let q = 2;
    io::print(fmt!("%b", vec::contains(v, &q)));

    max = 0;

    for vec::each(v)|i|{
        if *i > max {
            max = *i;
        }

        io::print(#fmt("%d ", *i));
    }

    io::print(fmt!("max : %d", max));
    io::println("\n");
}