1 error: unused variable: `x`
2 --> $DIR/issue-17999.rs:15:13
4 LL | let x = (); //~ ERROR: unused variable: `x`
5 | ^ help: consider using `_x` instead
7 note: lint level defined here
8 --> $DIR/issue-17999.rs:11:9
10 LL | #![deny(unused_variables)]
13 error: unused variable: `a`
14 --> $DIR/issue-17999.rs:17:13
16 LL | a => {} //~ ERROR: unused variable: `a`
17 | ^ help: consider using `_a` instead
19 error: aborting due to 2 previous errors