src/tools/miri/tests/compile-fail/copy_unaligned.rs

//error-pattern: tried to access memory with alignment 1, but alignment 2 is required

fn main() {
    let mut data = [0u16; 8];
    let ptr = (&mut data[0] as *mut u16 as *mut u8).wrapping_add(1) as *mut u16;
    // Even copying 0 elements to something unaligned should error
    unsafe { ptr.copy_from(&data[5], 0); }
}