//@ run-pass


fn want_slice(v: &[isize]) -> isize {
    let mut sum = 0;
    for i in v { sum += *i; }
    sum
}

fn has_mut_vec(v: Vec<isize> ) -> isize {
    want_slice(&v)
}

pub fn main() {
    assert_eq!(has_mut_vec(vec![1, 2, 3]), 6);
}