error[E0380]: auto traits cannot have methods or associated items --> $DIR/issue-23080-2.rs:6:10 | LL | unsafe auto trait Trait { | ----- auto trait cannot have items LL | type Output; | ^^^^^^ 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 have detailed explanations: E0275, E0380. For more information about an error, try `rustc --explain E0275`.