// 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)] | |
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() { } |