error: unused variable: `unused`
  --> $DIR/lint-renamed-allow.rs:8:17
   |
LL | fn main() { let unused = (); }
   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
   |
note: lint level defined here
  --> $DIR/lint-renamed-allow.rs:7:8
   |
LL | #[deny(unused)]
   |        ^^^^^^
   = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]`

error: aborting due to previous error