src/test/run-pass/issue-14875.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Check that values are not leaked when a dtor panics (#14875)
  12
  13 use std::panic::{self, UnwindSafe};
  14
  15 struct SetInnerOnDrop<'a>(&'a mut bool);
  16
  17 impl<'a> UnwindSafe for SetInnerOnDrop<'a> {}
  18
  19 impl<'a> Drop for SetInnerOnDrop<'a> {
  20     fn drop(&mut self) {
  21         *self.0 = true;
  22     }
  23 }
  24
  25 struct PanicOnDrop;
  26 impl Drop for PanicOnDrop {
  27     fn drop(&mut self) {
  28         panic!("test panic");
  29     }
  30 }
  31
  32
  33 fn main() {
  34     let mut set_on_drop = false;
  35     {
  36         let set_inner_on_drop = SetInnerOnDrop(&mut set_on_drop);
  37         let _ = panic::catch_unwind(|| {
  38             let _set_inner_on_drop = set_inner_on_drop;
  39             let _panic_on_drop = PanicOnDrop;
  40         });
  41     }
  42     assert!(set_on_drop);
  43 }