1 error: enum is never used: `E`
2 --> $DIR/lint-dead-code-empty-unused-enum.rs:3:1
7 note: lint level defined here
8 --> $DIR/lint-dead-code-empty-unused-enum.rs:1:9
12 = note: `#[deny(dead_code)]` implied by `#[deny(unused)]`
14 error: aborting due to previous error