error[E0364]: `legacy_macro` is only public within the crate, and cannot be re-exported outside
  --> $DIR/macro-rules.rs:11:13
   |
LL |     pub use legacy_macro as _;
   |             ^^^^^^^^^^^^^^^^^
   |
help: consider adding a `#[macro_export]` to the macro in the imported module
  --> $DIR/macro-rules.rs:7:5
   |
LL |     macro_rules! legacy_macro { () => () }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0364`.