warning: rule #3 of macro `local_attr` is never used
  --> $DIR/macro-rules-attr.rs:43:9
   |
LL |     attr() {} => {
   |         ^^ ^^
   |
note: the lint level is defined here
  --> $DIR/macro-rules-attr.rs:4:9
   |
LL | #![warn(unused)]
   |         ^^^^^^
   = note: `#[warn(unused_macro_rules)]` implied by `#[warn(unused)]`

warning: rule #5 of macro `local_attr` is never used
  --> $DIR/macro-rules-attr.rs:49:5
   |
LL |     {} => {
   |     ^^

warning: 2 warnings emitted