#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::mem::ManuallyDrop;
use std::pin::Pin;
struct Type;
fn main() {
    let mut pin: Pin<Box<ManuallyDrop<Type>>> = Box::pin(ManuallyDrop::new(Type));
    let inner: Pin<&mut Type> = unsafe {
        Pin::map_unchecked_mut(pin.as_mut(), |x| &mut **x)
    };
}