#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::sync::atomic::{AtomicI8, Ordering};
fn main() {
    let foo = AtomicI8::new(20);
    assert_eq!(foo.fetch_sub(10, Ordering::SeqCst), 20);
    assert_eq!(foo.load(Ordering::SeqCst), 10);
}