1 error: lifetime parameter `'a` never used
2 --> $DIR/zero-uses-in-impl.rs:8:6
5 | -^^- help: elide the unused lifetime
7 note: the lint level is defined here
8 --> $DIR/zero-uses-in-impl.rs:3:9
10 LL | #![deny(unused_lifetimes)]
13 error: aborting due to previous error