3 // Check that computing the lub works even for empty binders.
4 fn lt<'a: 'a>() -> &'a () {
8 fn lt_in_fn<'a: 'a>() -> fn(&'a ()) {
12 struct Contra<'a>(fn(&'a ()));
13 fn lt_in_contra<'a: 'a>() -> Contra<'a> {
17 fn ok<'a, 'b, 'upper, 'lower>(v: bool)
25 let _: &'lower () = match v {
30 // This errored in the past because LUB and GLB always
31 // bailed out when encountering binders, even if they were
33 let _: fn(&'upper ()) = match v {
34 true => lt_in_fn::<'a>(),
35 false => lt_in_fn::<'b>(),
38 // This was already accepted, as relate didn't encounter any binders.
39 let _: Contra<'upper> = match v {
40 true => lt_in_contra::<'a>(),
41 false => lt_in_contra::<'b>(),