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 // ignore-tidy-linelength
13 //[mir]compile-flags: -Z borrowck=mir
15 #![feature(unboxed_closures)]
19 fn to_fn_once<A,F:FnOnce<A>>(f: F) -> F { f }
23 to_fn_once(move|| { x = 2; });
24 //[ast]~^ ERROR: cannot assign to immutable captured outer variable
25 //[mir]~^^ ERROR: cannot assign to `x`, as it is not declared as mutable
27 let s = std::io::stdin();
28 to_fn_once(move|| { s.read_to_end(&mut Vec::new()); });
29 //[ast]~^ ERROR: cannot borrow immutable captured outer variable
30 //[mir]~^^ ERROR: cannot borrow `s` as mutable, as it is not declared as mutable