| // error-pattern:drop 1 |
| // error-pattern:drop 2 |
| // ignore-cloudabi no std::process |
| |
| /// Structure which will not allow to be dropped twice. |
| struct Droppable<'a>(&'a mut bool, u32); |
| impl<'a> Drop for Droppable<'a> { |
| fn drop(&mut self) { |
| if *self.0 { |
| eprintln!("{} dropped twice", self.1); |
| ::std::process::exit(1); |
| } |
| eprintln!("drop {}", self.1); |
| *self.0 = true; |
| } |
| } |
| |
| fn mir() { |
| let (mut xv, mut yv) = (false, false); |
| let x = Droppable(&mut xv, 1); |
| let y = Droppable(&mut yv, 2); |
| let mut z = x; |
| let k = y; |
| z = k; |
| } |
| |
| fn main() { |
| mir(); |
| panic!(); |
| } |