#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(transmutability)]
use core::mem::{Assume, TransmuteFrom};
#[repr(C, align(2))]
struct Dst(u8);
fn main() {
    let src = 42u8;
    let _ = unsafe { <Dst as TransmuteFrom<u8, { Assume::SAFETY }>>::transmute(src) };
}