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[E0659]: `legacy_macro` is ambiguous
  --> $DIR/macro-rules.rs:31:13
   |
LL |         use legacy_macro as _;
   |             ^^^^^^^^^^^^ ambiguous name
   |
   = note: ambiguous because of multiple potential import sources
note: `legacy_macro` could refer to the macro defined here
  --> $DIR/macro-rules.rs:28:9
   |
LL |         macro_rules! legacy_macro { () => () }
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: `legacy_macro` could also refer to the macro defined here
  --> $DIR/macro-rules.rs:25:5
   |
LL |     macro legacy_macro() {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^
   = help: use `self::legacy_macro` to refer to this macro unambiguously

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0364, E0659.
For more information about an error, try `rustc --explain E0364`.