rust/tests/compile-fail/static_memory_modification2.rs

// Validation detects that we are casting & to &mut and so it changes why we fail
// compile-flags: -Zmir-emit-validate=0

use std::mem::transmute;

#[allow(mutable_transmutes)]
fn main() {
    unsafe {
        let s = "this is a test";
        transmute::<&[u8], &mut [u8]>(s.as_bytes())[4] = 42; //~ ERROR constant evaluation error
        //~^ NOTE tried to modify constant memory
    }
}