| // 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. |
| |
| // Creating a stack closure which references a box and then |
| // transferring ownership of the box before invoking the stack |
| // closure results in a crash. |
| |
| #![feature(box_syntax)] |
| |
| fn twice(x: Box<usize>) -> usize { |
| *x * 2 |
| } |
| |
| fn invoke<F>(f: F) where F: FnOnce() -> usize { |
| f(); |
| } |
| |
| fn main() { |
| let x : Box<usize> = box 9; |
| let sq = || { *x * *x }; |
| |
| twice(x); //~ ERROR: cannot move out of |
| invoke(sq); |
| } |
