1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Tests that two closures cannot simultaneously have mutable
12 // access to the variable, whether that mutable access be used
13 // for direct assignment or for taking mutable ref. Issue #6801.
15 #![feature(box_syntax)]
19 let c1 = |&mut:| x = 4;
20 let c2 = |&mut:| x = 5; //~ ERROR cannot borrow `x` as mutable more than once
23 fn set(x: &mut isize) {
29 let c1 = |&mut:| set(&mut x);
30 let c2 = |&mut:| set(&mut x); //~ ERROR cannot borrow `x` as mutable more than once
35 let c1 = |&mut:| x = 5;
36 let c2 = |&mut:| set(&mut x); //~ ERROR cannot borrow `x` as mutable more than once
41 let c1 = |&mut:| x = 5;
42 let c2 = |&mut:| { let _y = |&mut:| set(&mut x); }; // (nested closure)
43 //~^ ERROR cannot borrow `x` as mutable more than once
51 let mut x = box Foo { f: box 3 };
52 let c1 = |&mut:| set(&mut *x.f);
53 let c2 = |&mut:| set(&mut *x.f);
54 //~^ ERROR cannot borrow `x` as mutable more than once