// mod std;

fn black_box(v: int) {  }

fn add(a: int, b: int) -> int {
    let s = a + b;
    if false {}
    s
}

fn main() {
    let a = 5;

    loop {
        a = 3;
    }

    let b = a;
    let c = b;

    black_box(b);
}