src/test/ui/proc-macro/helper-attr-blocked-by-import-ambig.rs

// aux-build:test-macros.rs

#[macro_use(Empty)]
extern crate test_macros;
use test_macros::empty_attr as empty_helper;

#[derive(Empty)]
#[empty_helper] //~ ERROR `empty_helper` is ambiguous
struct S;

fn main() {}