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`.