rust/tests/compile-fail/stacked_borrows/static_memory_modification.rs

// FIXME still considering whether we are okay with this not being an error
// ignore-test

static X: usize = 5;

#[allow(mutable_transmutes)]
fn main() {
    let _x = unsafe {
        std::mem::transmute::<&usize, &mut usize>(&X) //~ ERROR mutable reference with frozen tag
    };
}