error: lifetime may not live long enough
--> tests/ui/contravariant.rs:7:5
|
6 | fn require_covariant<'a>(phantom: ContravariantPhantom<&'static str>) -> ContravariantPhantom<&'a str> {
| -- lifetime `'a` defined here
7 | phantom
| ^^^^^^^ returning this value requires that `'a` must outlive `'static`