error: useless lint attribute --> $DIR/useless_attribute.rs:5:1 | 5 | #[allow(dead_code, unused_extern_crates)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if you just forgot a `!`, use: `#![allow(dead_code, unused_extern_crates)]` | = note: `-D useless-attribute` implied by `-D warnings` error: aborting due to previous error