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#![feature(const_mut_refs)]
const MISALIGNED_LOAD: () = unsafe {
let mem = [0u32; 8];
let ptr = mem.as_ptr().byte_add(1);
let _val = *ptr; //~ERROR: evaluation of constant value failed
//~^NOTE: based on pointer with alignment 1, but alignment 4 is required
};
const MISALIGNED_STORE: () = unsafe {
let mut mem = [0u32; 8];
let ptr = mem.as_mut_ptr().byte_add(1);
*ptr = 0; //~ERROR: evaluation of constant value failed
//~^NOTE: based on pointer with alignment 1, but alignment 4 is required
};
const MISALIGNED_COPY: () = unsafe {
let x = &[0_u8; 4];
let y = x.as_ptr().cast::<u32>();
let mut z = 123;
y.copy_to_nonoverlapping(&mut z, 1);
//~^NOTE
// The actual error points into the implementation of `copy_to_nonoverlapping`.
};
const MISALIGNED_FIELD: () = unsafe {
#[repr(align(16))]
struct Aligned(f32);
let mem = [0f32; 8];
let ptr = mem.as_ptr().cast::<Aligned>();
// Accessing an f32 field but we still require the alignment of the pointer type.
let _val = (*ptr).0; //~ERROR: evaluation of constant value failed
//~^NOTE: based on pointer with alignment 4, but alignment 16 is required
};
const OOB: () = unsafe {
let mem = [0u32; 1];
let ptr = mem.as_ptr().cast::<u64>();
let _val = *ptr; //~ERROR: evaluation of constant value failed
//~^NOTE: size 4, so pointer to 8 bytes starting at offset 0 is out-of-bounds
};
fn main() {}
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