29 lines
798 B
Rust
29 lines
798 B
Rust
// Copyright 2013 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.
|
|
|
|
// Testing guarantees provided by once functions.
|
|
// This program would segfault if it were legal.
|
|
|
|
#![feature(once_fns)]
|
|
use std::sync::Arc;
|
|
|
|
fn foo<F:FnOnce()>(blk: F) {
|
|
blk();
|
|
blk(); //~ ERROR use of moved value
|
|
}
|
|
|
|
fn main() {
|
|
let x = Arc::new(true);
|
|
foo(move|| {
|
|
assert!(*x);
|
|
drop(x);
|
|
});
|
|
}
|