src/test/run-pass/structs-enums/unit-like-struct-drop-run.rs

   1 // Copyright 2013 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 // run-pass
  12 // ignore-emscripten no threads support
  13
  14 // Make sure the destructor is run for unit-like structs.
  15
  16
  17 #![feature(alloc)]
  18
  19 use std::thread;
  20
  21 struct Foo;
  22
  23 impl Drop for Foo {
  24     fn drop(&mut self) {
  25         panic!("This panic should happen.");
  26     }
  27 }
  28
  29 pub fn main() {
  30     let x = thread::spawn(move|| {
  31         let _b = Foo;
  32     }).join();
  33
  34     let s = x.unwrap_err().downcast::<&'static str>().unwrap();
  35     assert_eq!(&**s, "This panic should happen.");
  36 }