// 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() { }