warning: unknown lint: `FOO_BAR`
  --> $DIR/not_found.rs:16:9
   |
LL | #[allow(FOO_BAR)]
   |         ^^^^^^^
   |
   = note: #[warn(unknown_lints)] on by default

warning: unknown lint: `DEAD_CODE`
  --> $DIR/not_found.rs:18:8
   |
LL | #[warn(DEAD_CODE)]
   |        ^^^^^^^^^ help: lowercase the lint name: `dead_code`

warning: unknown lint: `Warnings`
  --> $DIR/not_found.rs:20:8
   |
LL | #[deny(Warnings)]
   |        ^^^^^^^^ help: lowercase the lint name: `warnings`