error: rule #4 of macro `num` is never used
  --> $DIR/unused-macro-rules.rs:10:5
   |
LL |     (four) => { 4 };
   |     ^^^^^^
   |
note: the lint level is defined here
  --> $DIR/unused-macro-rules.rs:1:9
   |
LL | #![deny(unused_macro_rules)]
   |         ^^^^^^^^^^^^^^^^^^

error: rule #2 of macro `num` is never used
  --> $DIR/unused-macro-rules.rs:8:5
   |
LL |     (two) => { 2 };
   |     ^^^^^

error: rule #3 of macro `num_rec` is never used
  --> $DIR/unused-macro-rules.rs:30:5
   |
LL |     (three) => {
   |     ^^^^^^^

error: aborting due to 3 previous errors