1 warning: unused variable: `a`
2 --> $DIR/attributes-included.rs:17:9
4 LL | let a: i32 = "foo";
5 | ^ help: if this is intentional, prefix it with an underscore: `_a`
7 note: the lint level is defined here
8 --> $DIR/attributes-included.rs:4:9
12 = note: `#[warn(unused_variables)]` implied by `#[warn(unused)]`
14 warning: 1 warning emitted