error: enum with no variants --> $DIR/empty_enum.rs:7:1 | 7 | enum Empty {} | ^^^^^^^^^^^^^ | = note: `-D empty-enum` implied by `-D warnings` help: consider using the uninhabited type `!` or a wrapper around it --> $DIR/empty_enum.rs:7:1 | 7 | enum Empty {} | ^^^^^^^^^^^^^ error: aborting due to previous error