// EXIT:9
unit errunion;

fn half(v: i32) -> !i32 {
    if v == 0 { return error.Empty; }
    return v / 2;
}

fn chain(v: i32) -> !i32 {
    let h: i32 = try half(v);
    return h + 1;
}

fn main() -> i32 {
    let good: i32 = chain(16) catch 100;
    let bad: i32 = chain(0) catch 0;
    return good + bad;
}