| // In contrast to `region-escape-via-bound-invariant`, in this case we | |
| // *can* return a value of type `&'x u32`, even though `'x` does not | |
| // appear in the bounds. This is because `&` is contravariant, and so | |
| // we are *actually* returning a `&'y u32`. | |
| // | |
| // See https://github.com/rust-lang/rust/issues/46541 for more details. | |
| //@ run-pass | |
| #![allow(dead_code)] | |
| trait Trait<'a> { } | |
| impl<'a, 'b> Trait<'b> for &'a u32 { } | |
| fn foo<'x, 'y>(x: &'x u32) -> impl Trait<'y> | |
| where 'x: 'y | |
| { | |
| x | |
| } | |
| fn main() { } |