rust/tests/compile-fail/intrinsics/copy_unaligned.rs
2022-05-25 18:26:33 +00:00

14 lines
509 B
Rust

#![feature(intrinsics)]
// Directly call intrinsic to avoid debug assertions in libstd
extern "rust-intrinsic" {
fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
}
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 { copy_nonoverlapping(&data[5], ptr, 0); } //~ ERROR accessing memory with alignment 1, but alignment 2 is required
}