error: struct `Foo` is never constructed
  --> $DIR/lint-unused-adt-appeared-in-pattern.rs:3:8
   |
LL | struct Foo(u8);
   |        ^^^
   |
note: the lint level is defined here
  --> $DIR/lint-unused-adt-appeared-in-pattern.rs:1:9
   |
LL | #![deny(dead_code)]
   |         ^^^^^^^^^

error: enum `Bar` is never used
  --> $DIR/lint-unused-adt-appeared-in-pattern.rs:5:6
   |
LL | enum Bar {
   |      ^^^

error: aborting due to 2 previous errors