warning: lint `raw_pointer_derive` has been removed: `using derive with raw pointers is ok`
   |
   = note: requested on the command line with `-D raw_pointer_derive`

error: unused variable: `unused`
  --> $DIR/lint-removed-cmdline.rs:22:17
   |
LL | fn main() { let unused = (); }
   |                 ^^^^^^ help: consider using `_unused` instead
   |
note: lint level defined here
  --> $DIR/lint-removed-cmdline.rs:21:8
   |
LL | #[deny(warnings)]
   |        ^^^^^^^^
   = note: #[deny(unused_variables)] implied by #[deny(warnings)]

error: aborting due to previous error