#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let mut slice: &mut [_] = &mut ['a', 'b', 'c'];
    let last = slice.split_off_last_mut().unwrap();
    *last = 'd';
    assert_eq!(slice, & ['a', 'b']);
    assert_eq!(last, &'d');
}