1 // https://github.com/rust-lang/rust/issues/73481
2 // This test used to cause unsoundness, since one of the two possible
3 // resolutions was chosen at random instead of erroring due to conflicts.
5 #![feature(type_alias_impl_trait)]
7 type Y<A, B> = impl std::fmt::Debug;
9 fn g<A, B>() -> (Y<A, B>, Y<B, A>) {
10 (42_i64, 60) //~ ERROR concrete type differs from previous defining opaque type use