src/test/ui/proc-macro/expand-to-unstable-2.rs

   1 // aux-build:derive-unstable-2.rs
   2
   3 #![feature(custom_attribute)]
   4
   5 #[macro_use]
   6 extern crate derive_unstable_2;
   7
   8 #[derive(Unstable)]
   9 //~^ ERROR attributes starting with `rustc` are reserved for use by the `rustc` compiler
  10
  11 struct A;
  12
  13 fn main() {
  14     foo();
  15 }