| error: this pattern takes a reference on something that is being de-referenced | |
| --> $DIR/needless_borrowed_ref.rs:7:34 | |
| | | |
| LL | let _ = v.iter_mut().filter(|&ref a| a.is_empty()); | |
| | ^^^^^^ help: try removing the `&ref` part and just keep: `a` | |
| | | |
| = note: `-D clippy::needless-borrowed-reference` implied by `-D warnings` | |
| error: aborting due to previous error | |