error[E0773]: attempted to define built-in macro more than once
  --> $DIR/duplicate-builtin.rs:13:5
   |
LL | /     pub macro test($item:item) {
LL | |
LL | |         /* compiler built-in */
LL | |     }
   | |_____^
   |
note: previously defined here
  --> $DIR/duplicate-builtin.rs:6:1
   |
LL | / pub macro test($item:item) {
LL | |
LL | |     /* compiler built-in */
LL | | }
   | |_^

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0773`.