error: unused variable: `field`
  --> $DIR/issue-54180-unused-ref-field.rs:20:22
   |
LL |         E::Variant { ref field } => (),
   |                      ^^^^^^^^^ help: try ignoring the field: `field: _`
   |
note: the lint level is defined here
  --> $DIR/issue-54180-unused-ref-field.rs:3:9
   |
LL | #![deny(unused)]
   |         ^^^^^^
   = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]`

error: unused variable: `f1`
  --> $DIR/issue-54180-unused-ref-field.rs:26:13
   |
LL |     let S { ref f1 } = s;
   |             ^^^^^^ help: try ignoring the field: `f1: _`

error: unused variable: `x`
  --> $DIR/issue-54180-unused-ref-field.rs:32:20
   |
LL |         Point { y, ref mut x } => y,
   |                    ^^^^^^^^^ help: try ignoring the field: `x: _`

error: unused variable: `x`
  --> $DIR/issue-54180-unused-ref-field.rs:29:45
   |
LL |     let _: i32 = points.iter().map(|Point { x, y }| y).sum();
   |                                             ^ help: try ignoring the field: `x: _`

error: aborting due to 4 previous errors