File: issue-63952.rs

package info (click to toggle)
rustc 1.87.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 925,564 kB
  • sloc: xml: 158,127; python: 36,039; javascript: 19,761; sh: 19,737; cpp: 18,981; ansic: 13,133; asm: 4,376; makefile: 710; perl: 29; lisp: 28; ruby: 19; sql: 11
file content (27 lines) | stat: -rw-r--r-- 529 bytes parent folder | download | duplicates (11)
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
// Regression test for #63952, shouldn't hang.
//@ stderr-per-bitwidth

#[repr(C)]
#[derive(Copy, Clone)]
struct SliceRepr {
    ptr: *const u8,
    len: usize,
}

union SliceTransmute {
    repr: SliceRepr,
    slice: &'static [u8],
}

// bad slice: length too big to even exist anywhere
const SLICE_WAY_TOO_LONG: &[u8] = unsafe { //~ ERROR: it is undefined behavior to use this value
    SliceTransmute {
        repr: SliceRepr {
            ptr: &42,
            len: usize::MAX,
        },
    }
    .slice
};

fn main() {}