warning: lint `bare_trait_object` has been renamed to `bare_trait_objects`
   |
   = help: use the new name `bare_trait_objects`
   = note: requested on the command line with `-D bare_trait_object`
   = note: `#[warn(renamed_and_removed_lints)]` on by default

warning: lint `bare_trait_object` has been renamed to `bare_trait_objects`
   |
   = help: use the new name `bare_trait_objects`
   = note: requested on the command line with `-D bare_trait_object`
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`

warning: lint `bare_trait_object` has been renamed to `bare_trait_objects`
   |
   = help: use the new name `bare_trait_objects`
   = note: requested on the command line with `-D bare_trait_object`
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`

error: unused variable: `unused`
  --> $DIR/lint-renamed-cmdline.rs:9:17
   |
LL | fn main() { let unused = (); }
   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
   |
note: the lint level is defined here
  --> $DIR/lint-renamed-cmdline.rs:8:8
   |
LL | #[deny(unused)]
   |        ^^^^^^
   = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]`

error: aborting due to 1 previous error; 3 warnings emitted