// Copyright 2012 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. fn main() { let x = Some(private::exclusive(false)); match x { Some(copy z) => { //~ ERROR copying a value of non-copyable type do z.with |b| { assert !*b; } } None => fail!() } }