| #![feature(rustc_attrs)] | |
| // This test checks that a warning occurs with migrate mode. | |
| #[rustc_error] | |
| fn main() { | |
| //~^ ERROR compilation successful | |
| let mut x = 0; | |
| || { | |
| || { | |
| //~^ WARNING captured variable cannot escape `FnMut` closure body | |
| //~| WARNING this error has been downgraded to a warning | |
| //~| WARNING this warning will become a hard error in the future | |
| let _y = &mut x; | |
| } | |
| }; | |
| } |