#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let x: Result<u32, &str> = Ok(5);
    let v: Vec<u32> = x.into_iter().collect();
    assert_eq!(v, [5]);
    let x: Result<u32, &str> = Err("nothing!");
    let v: Vec<u32> = x.into_iter().collect();
    assert_eq!(v, []);
}