-// Copyright 2017 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.
-
-// compile-pass
+#![feature(rustc_attrs)]
#![allow(unused)]
+// revisions: migrate nll
+#![cfg_attr(nll, feature(nll))]
+
fn f() {
let mut x: Box<()> = Box::new(());
|| {
&mut x
};
+ //[migrate]~^^ WARNING captured variable cannot escape `FnMut` closure body
+ //[migrate]~| WARNING this error has been downgraded to a warning
+ //[migrate]~| WARNING this warning will become a hard error in the future
+ //[nll]~^^^^^ ERROR captured variable cannot escape `FnMut` closure body
}
-
+#[rustc_error]
fn main() {}
+//[migrate]~^ ERROR