error: expected non-macro attribute, found attribute macro `empty_attr`
  --> $DIR/proc-macro-gates2.rs:12:13
   |
LL | fn _test6<#[empty_attr] T>() {}
   |             ^^^^^^^^^^ not a non-macro attribute

error: expected non-macro attribute, found attribute macro `empty_attr`
  --> $DIR/proc-macro-gates2.rs:17:11
   |
LL |         #[empty_attr]
   |           ^^^^^^^^^^ not a non-macro attribute

error: aborting due to 2 previous errors