rust/tests/fail/unaligned_pointers/unaligned_ptr_zst.rs

// This should fail even without validation
// Some optimizations remove ZST accesses, thus masking this UB.
// compile-flags: -Zmir-opt-level=0 -Zmiri-disable-validation

fn main() {
    for i in 0..10 { // Try many times as this might work by chance.
        let x = i as u8;
        let x = &x as *const _ as *const [u32; 0];
        // This must fail because alignment is violated. Test specifically for loading ZST.
        let _x = unsafe { *x }; //~ERROR alignment 4 is required
    }
}