File: const_refs_to_static_fail.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (24 lines) | stat: -rw-r--r-- 831 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
//@ 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"
//@ dont-require-annotations: NOTE

#![feature(sync_unsafe_cell)]

use std::cell::SyncUnsafeCell;

static S: SyncUnsafeCell<i32> = SyncUnsafeCell::new(0);
static mut S_MUT: i32 = 0;

const C1: &SyncUnsafeCell<i32> = &S; //~ERROR undefined behavior
//~| NOTE encountered reference to mutable memory
const C1_READ: () = unsafe {
    assert!(*C1.get() == 0);
};
const C2: *const i32 = unsafe { std::ptr::addr_of!(S_MUT) };
const C2_READ: () = unsafe {
    assert!(*C2 == 0); //~ERROR evaluation of constant value failed
    //~^ NOTE constant accesses mutable global memory
};

fn main() {
}