#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let len = 'A'.len_utf8();
    assert_eq!(len, 1);
    let len = 'ß'.len_utf8();
    assert_eq!(len, 2);
    let len = 'ℝ'.len_utf8();
    assert_eq!(len, 3);
    let len = '💣'.len_utf8();
    assert_eq!(len, 4);
}