1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/expand-to-unstable-2.rs b/src/test/ui/proc-macro/expand-to-unstable-2.rs
new file mode 100644
index 000000000..4160e5418
--- /dev/null
+++ b/src/test/ui/proc-macro/expand-to-unstable-2.rs
@@ -0,0 +1,17 @@
+// aux-build:derive-unstable-2.rs
+
+#![feature(register_attr)]
+
+#![register_attr(rustc_foo)]
+
+#[macro_use]
+extern crate derive_unstable_2;
+
+#[derive(Unstable)]
+//~^ ERROR attributes starting with `rustc` are reserved for use by the `rustc` compiler
+
+struct A;
+
+fn main() {
+    foo();
+}