error[E0428]: the name `mac` is defined multiple times
  --> $DIR/pub-macro-rules-fail.rs:8:5
   |
LL |     pub macro_rules! mac { () => {} }
   |     -------------------- previous definition of the macro `mac` here
...
LL |     pub macro_rules! mac { () => {} }
   |     ^^^^^^^^^^^^^^^^^^^^ `mac` redefined here
   |
   = note: `mac` must be defined only once in the macro namespace of this module

error[E0433]: failed to resolve: maybe a missing crate `mac`?
  --> $DIR/pub-macro-rules-fail.rs:22:12
   |
LL |     crate::mac!();
   |            ^^^ maybe a missing crate `mac`?

error[E0433]: failed to resolve: maybe a missing crate `block_mac`?
  --> $DIR/pub-macro-rules-fail.rs:23:12
   |
LL |     crate::block_mac!();
   |            ^^^^^^^^^ maybe a missing crate `block_mac`?

error: cannot find macro `mac` in this scope
  --> $DIR/pub-macro-rules-fail.rs:19:5
   |
LL |     mac!();
   |     ^^^
   |
   = note: consider importing this macro:
           m::mac

error[E0603]: macro `private_mac` is private
  --> $DIR/pub-macro-rules-fail.rs:25:15
   |
LL |     crate::m::private_mac!();
   |               ^^^^^^^^^^^ private macro
   |
note: the macro `private_mac` is defined here
  --> $DIR/pub-macro-rules-fail.rs:10:5
   |
LL |     pub(self) macro_rules! private_mac { () => {} }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 5 previous errors

Some errors have detailed explanations: E0428, E0433, E0603.
For more information about an error, try `rustc --explain E0428`.