1 warning: unused variable: `a`
2 --> $DIR/liveness-derive.rs:15:13
5 | ^ help: if this is intentional, prefix it with an underscore: `_a`
7 note: the lint level is defined here
8 --> $DIR/liveness-derive.rs:6:9
12 = note: `#[warn(unused_variables)]` implied by `#[warn(unused)]`
14 warning: unused variable: `b`
15 --> $DIR/liveness-derive.rs:20:13
18 | ^ help: if this is intentional, prefix it with an underscore: `_b`
20 warning: 2 warnings emitted