src/test/ui/macros/issue-58490.stderr

   1 error[E0428]: the name `b` is defined multiple times
   2   --> $DIR/issue-58490.rs:18:5
   3    |
   4 LL |         macro_rules! b { () => () }
   5    |         -------------- previous definition of the macro `b` here
   6 ...
   7 LL |     macro_rules! b { () => () }
   8    |     ^^^^^^^^^^^^^^ `b` redefined here
   9    |
  10    = note: `b` must be defined only once in the macro namespace of this module
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0428`.