error: type alias is never used: `Unused`
  --> $DIR/lint-dead-code-type-alias.rs:14:1
   |
LL | type Unused = u8; //~ ERROR type alias is never used
   | ^^^^^^^^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/lint-dead-code-type-alias.rs:11:9
   |
LL | #![deny(dead_code)]
   |         ^^^^^^^^^

error: aborting due to previous error