#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(allocator_api, ptr_as_uninit)]
use std::alloc::{Allocator, Layout, Global};
use std::mem::MaybeUninit;
use std::ptr::NonNull;
fn main() -> Result<(), impl core::fmt::Debug> {
    let memory: NonNull<[u8]> = Global.allocate(Layout::new::<[u8; 32]>())?;
    #[allow(unused_variables)]
    let slice: &mut [MaybeUninit<u8>] = unsafe { memory.as_uninit_slice_mut() };
    unsafe {
        Global.deallocate(memory.cast(), Layout::new::<[u8; 32]>());
    }
    Ok::<_, std::alloc::AllocError>(())
}