#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let mut chars = "é".chars();
    assert_eq!(Some('\u{00e9}'), chars.next());
    assert_eq!(None, chars.next());
    let mut chars = "é".chars();
    assert_eq!(Some('\u{0065}'), chars.next());
    assert_eq!(Some('\u{0301}'), chars.next());
    assert_eq!(None, chars.next());
}