| // Copyright 2014 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. |
| |
| // no-prefer-dynamic |
| |
| // This would previously leak the Box<Trait> because we wouldn't |
| // schedule cleanups when auto borrowing trait objects. |
| // This program should be valgrind clean. |
| |
| #![feature(box_syntax)] |
| |
| static mut DROP_RAN: bool = false; |
| |
| struct Foo; |
| impl Drop for Foo { |
| fn drop(&mut self) { |
| unsafe { DROP_RAN = true; } |
| } |
| } |
| |
| |
| trait Trait { fn dummy(&self) { } } |
| impl Trait for Foo {} |
| |
| pub fn main() { |
| { |
| let _x: &Trait = &*(box Foo as Box<Trait>); |
| } |
| unsafe { |
| assert!(DROP_RAN); |
| } |
| } |
