#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![forbid(unsafe_code)]
use std::cell::UnsafeCell;
fn main() {
    let mut x: UnsafeCell<i32> = 42.into();
    let p_unique: &mut UnsafeCell<i32> = &mut x;
    *p_unique.get_mut() = 0;
    x = UnsafeCell::new(0);
    let contents: i32 = x.into_inner();
    assert_eq!(contents, 0);
}