| // 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. |
| |
| // Test that we do not allow the region `'x` to escape in the impl |
| // trait **even though** `'y` escapes, which outlives `'x`. |
| // |
| // See https://github.com/rust-lang/rust/issues/46541 for more details. |
| |
| #![allow(dead_code)] |
| #![feature(in_band_lifetimes)] |
| #![feature(nll)] |
| |
| use std::cell::Cell; |
| |
| trait Trait<'a> { } |
| |
| impl Trait<'b> for Cell<&'a u32> { } |
| |
| fn foo(x: Cell<&'x u32>) -> impl Trait<'y> |
| //~^ ERROR hidden type for `impl Trait` captures lifetime that does not appear in bounds [E0700] |
| where 'x: 'y |
| { |
| x |
| } |
| |
| fn main() { } |
