| // Copyright 2016 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. |
| |
| // revisions: ast mir |
| //[mir]compile-flags: -Z borrowck=mir |
| |
| // FIXME(#49821) -- No tip about using a let binding |
| |
| use std::cell::RefCell; |
| |
| fn main() { |
| let mut r = 0; |
| let s = 0; |
| let x = RefCell::new((&mut r,s)); |
| |
| let val: &_ = x.borrow().0; |
| //[ast]~^ ERROR borrowed value does not live long enough [E0597] |
| //[ast]~| NOTE temporary value dropped here while still borrowed |
| //[ast]~| NOTE temporary value does not live long enough |
| //[ast]~| NOTE consider using a `let` binding to increase its lifetime |
| //[mir]~^^^^^ ERROR temporary value dropped while borrowed [E0716] |
| //[mir]~| NOTE temporary value is freed at the end of this statement |
| //[mir]~| NOTE creates a temporary which is freed while still in use |
| //[mir]~| NOTE consider using a `let` binding to create a longer lived value |
| println!("{}", val); |
| //[mir]~^ borrow later used here |
| } |
| //[ast]~^ NOTE temporary value needs to live until here |
