1 error: needlessly taken reference of both operands
2 --> $DIR/op_ref.rs:10:15
4 LL | let foo = &5 - &6;
7 = note: `-D clippy::op-ref` implied by `-D warnings`
8 help: use the values directly
13 error: taken reference of right operand
14 --> $DIR/op_ref.rs:18:8
19 | help: use the right value directly: `a`
21 error: aborting due to 2 previous errors