#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let mut bytes = "bors".bytes();
    assert_eq!(Some(b'b'), bytes.next());
    assert_eq!(Some(b'o'), bytes.next());
    assert_eq!(Some(b'r'), bytes.next());
    assert_eq!(Some(b's'), bytes.next());
    assert_eq!(None, bytes.next());
}