1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
// Strip out raw byte dumps to make comparison platform-independent:
//@ normalize-stderr: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
//@ normalize-stderr: "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
#![feature(core_intrinsics)]
#![feature(never_type)]
use std::intrinsics;
use std::mem;
#[derive(Copy, Clone)]
enum Bar {}
#[repr(C)]
union MaybeUninit<T: Copy> {
uninit: (),
init: T,
}
const BAD_BAD_BAD: Bar = unsafe { MaybeUninit { uninit: () }.init };
//~^ ERROR evaluation of constant value failed
//~| constructing invalid value
const BAD_BAD_REF: &Bar = unsafe { mem::transmute(1usize) };
//~^ ERROR it is undefined behavior to use this value
//~| constructing invalid value
const BAD_BAD_ARRAY: [Bar; 1] = unsafe { MaybeUninit { uninit: () }.init };
//~^ ERROR evaluation of constant value failed
//~| constructing invalid value
const READ_NEVER: () = unsafe {
let mem = [0u32; 8];
let ptr = mem.as_ptr().cast::<!>();
let _val = intrinsics::read_via_copy(ptr);
//~^ ERROR evaluation of constant value failed
//~| constructing invalid value
};
fn main() {}
|
