src/test/ui/proc-macro/define-two.stderr

   1 error[E0428]: the name `A` is defined multiple times
   2   --> $DIR/define-two.rs:15:21
   3    |
   4 LL | #[proc_macro_derive(A)]
   5    |                     - previous definition of the macro `A` here
   6 ...
   7 LL | #[proc_macro_derive(A)]
   8    |                     ^ `A` redefined here
   9    |
  10    = note: `A` 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`.