//@ compile-flags: -Z ui-testing=no #![feature(const_swap)] use std::{ mem::{self, MaybeUninit}, ptr, }; const X: () = { let mut ptr1 = &1; let mut ptr2 = &2; // Swap them, bytewise. unsafe { ptr::swap_nonoverlapping( &mut ptr1 as *mut _ as *mut MaybeUninit, &mut ptr2 as *mut _ as *mut MaybeUninit, mem::size_of::<&i32>(), ); } }; fn main() { X }