#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(atomic_from_mut)]
use std::sync::atomic::{AtomicI8, Ordering};
fn main() {
    let mut some_int = 123;
    let a = AtomicI8::from_mut(&mut some_int);
    a.store(100, Ordering::Relaxed);
    assert_eq!(some_int, 100);
}