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

   1 // aux-build:derive-unstable-2.rs
   2
   3 #![feature(register_attr)]
   4
   5 #![register_attr(rustc_foo)]
   6
   7 #[macro_use]
   8 extern crate derive_unstable_2;
   9
  10 #[derive(Unstable)]
  11 //~^ ERROR attributes starting with `rustc` are reserved for use by the `rustc` compiler
  12
  13 struct A;
  14
  15 fn main() {
  16     foo();
  17 }