error: unused attribute
  --> $DIR/plugin-attr-register-deny.rs:14:5
   |
LL |     #[bar]
   |     ^^^^^^
   |
note: lint level defined here
  --> $DIR/plugin-attr-register-deny.rs:6:9
   |
LL | #![deny(unused_attributes)]
   |         ^^^^^^^^^^^^^^^^^

error: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
  --> $DIR/plugin-attr-register-deny.rs:14:5
   |
LL |     #[bar]
   |     ^^^^^^

error: unused attribute
  --> $DIR/plugin-attr-register-deny.rs:11:1
   |
LL | #[foo]
   | ^^^^^^

error: aborting due to 3 previous errors