error: this lifetime isn't used in the function definition --> $DIR/unused_lt.rs:16:14 | 16 | fn unused_lt<'a>(x: u8) { //~ ERROR this lifetime | ^^ | note: lint level defined here --> $DIR/unused_lt.rs:4:9 | 4 | #![deny(unused_lifetimes)] | ^^^^^^^^^^^^^^^^ error: this lifetime isn't used in the function definition --> $DIR/unused_lt.rs:20:25 | 20 | fn unused_lt_transitive<'a, 'b: 'a>(x: &'b u8) { //~ ERROR this lifetime | ^^ error: this lifetime isn't used in the function definition --> $DIR/unused_lt.rs:50:10 | 50 | fn x<'a>(&self) {} //~ ERROR this lifetime | ^^ error: aborting due to 3 previous errors