| //@ run-crash |
| //@ compile-flags: -Copt-level=3 -Cdebug-assertions=no -Zub-checks=yes |
| //@ error-pattern: unsafe precondition(s) violated: str::get_unchecked_mut requires |
| //@ revisions: range range_to range_from backwards_range |
| |
| fn main() { |
| unsafe { |
| let mut s: String = "💅".chars().collect(); |
| let mut s: &mut str = &mut s; |
| #[cfg(range)] |
| s.get_unchecked_mut(4..5); |
| #[cfg(range_to)] |
| s.get_unchecked_mut(..5); |
| #[cfg(range_from)] |
| s.get_unchecked_mut(5..); |
| #[cfg(backwards_range)] |
| s.get_unchecked_mut(1..0); |
| } |
| } |