// Validation detects that we are casting & to &mut and so it changes why we fail // compile-flags: -Zmiri-disable-validation static X: usize = 5; #[allow(mutable_transmutes)] fn main() { unsafe { *std::mem::transmute::<&usize, &mut usize>(&X) = 6; //~ ERROR tried to modify constant memory assert_eq!(X, 6); } }