| // 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)] | |
| use std::cell::Cell; | |
| trait Trait<'a> { } | |
| impl<'a, 'b> Trait<'b> for Cell<&'a u32> { } | |
| fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y> | |
| where 'x: 'y | |
| { | |
| x | |
| //~^ ERROR hidden type for `impl Trait<'y>` captures lifetime that does not appear in bounds [E0700] | |
| } | |
| fn main() { } |