| //@ aux-build:test-macros.rs | |
| #[macro_use(Empty)] | |
| extern crate test_macros; | |
| use test_macros::empty_attr as empty_helper; | |
| #[empty_helper] //~ ERROR `empty_helper` is ambiguous | |
| //~| WARN derive helper attribute is used before it is introduced | |
| //~| WARN this was previously accepted | |
| #[derive(Empty)] | |
| struct S; | |
| fn main() {} |