#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::mem::MaybeUninit;
fn main() {
    let mut x = MaybeUninit::<u32>::uninit();
    x.write(13);
    let x1 = unsafe { x.assume_init_read() };
    let x2 = unsafe { x.assume_init_read() };
    assert_eq!(x1, x2);
    let mut x = MaybeUninit::<Option<Vec<u32>>>::uninit();
    x.write(None);
    let x1 = unsafe { x.assume_init_read() };
    let x2 = unsafe { x.assume_init_read() };
    assert_eq!(x1, x2);
}