| #[repr(u32)] |
| #[derive(Debug)] |
| enum Bool { |
| True, |
| } |
| |
| fn evil(x: &mut Bool) { |
| let x = x as *mut _ as *mut u32; |
| unsafe { *x = 44 }; // out-of-bounds enum tag |
| } |
| |
| #[rustfmt::skip] // rustfmt bug: https://github.com/rust-lang/rustfmt/issues/5391 |
| fn main() { |
| let mut x = Bool::True; |
| evil(&mut x); |
| let y = x; // reading this ought to be enough to trigger validation |
| //~^ ERROR: constructing invalid value at .<enum-tag>: encountered 0x0000002c, but expected a valid enum tag |
| println!("{:?}", y); // make sure it is used (and not optimized away) |
| } |
