rust/src/test/compile-fail/arc-rw-write-mode-shouldnt-escape.rs
2014-02-05 11:56:04 -05:00

22 lines
848 B
Rust

// 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 <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.
// error-pattern: lifetime of variable does not enclose its declaration
extern mod sync;
use sync::RWArc;
fn main() {
let x = ~RWArc::new(1);
let mut y = None;
x.write_downgrade(|write_mode| y = Some(write_mode));
y.unwrap();
// Adding this line causes a method unification failure instead
// (&option::unwrap(y)).write(|state| { assert!(*state == 1); })
}