warning: function is never used: `lintme`
  --> $DIR/lint-plugin-cmdline-allow.rs:20:1
   |
LL | fn lintme() { }
   | ^^^^^^^^^^^
   |
note: lint level defined here
  --> $DIR/lint-plugin-cmdline-allow.rs:17:9
   |
LL | #![warn(unused)]
   |         ^^^^^^
   = note: #[warn(dead_code)] implied by #[warn(unused)]