error[E0380]: auto traits cannot have methods or associated items --> $DIR/issue-23080-2.rs:7:1 | LL | / unsafe auto trait Trait { LL | | //~^ ERROR E0380 LL | | type Output; LL | | } | |_^ error[E0275]: overflow evaluating the requirement `<() as Trait>::Output` | = note: required because of the requirements on the impl of `Trait` for `()` = note: required because of the requirements on the impl of `Trait` for `()` error: aborting due to 2 previous errors Some errors occurred: E0275, E0380. For more information about an error, try `rustc --explain E0275`.