Shared via Rust Playground

playground.rs

fn main() {
    let mut p = get_mut();

    for &x in p.iter() {
        print!("{} ", x);
    }
    println!("");
}

fn get_mut<'s>() -> &'s mut Vec<i16> {
    let mut x: Vec<i16> = vec![1, 2, 3];
    for i in x.iter_mut() {
        *i += 1;
    }
    &mut x
}