warning: unknown lint: `FOO_BAR`
  --> $DIR/not_found.rs:6:9
   |
LL | #[allow(FOO_BAR)]
   |         ^^^^^^^
   |
   = note: `#[warn(unknown_lints)]` on by default

warning: unknown lint: `DEAD_CODE`
  --> $DIR/not_found.rs:10:8
   |
LL | #[warn(DEAD_CODE)]
   |        ^^^^^^^^^ help: did you mean: `dead_code`

warning: unknown lint: `Warnings`
  --> $DIR/not_found.rs:15:8
   |
LL | #[deny(Warnings)]
   |        ^^^^^^^^ help: did you mean (notice the capitalization): `warnings`

warning: 3 warnings emitted