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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// 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!();
}
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