error: unreachable expression
  --> $DIR/unwarned-match-on-never.rs:10:5
   |
LL |     match x {} //~ ERROR: unreachable expression
   |     ^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/unwarned-match-on-never.rs:1:9
   |
LL | #![deny(unreachable_code)]
   |         ^^^^^^^^^^^^^^^^

error: unreachable expression
  --> $DIR/unwarned-match-on-never.rs:15:5
   |
LL | /     match () { //~ ERROR: unreachable expression
LL | |         () => (),
LL | |     }
   | |_____^

error: aborting due to 2 previous errors