1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/expand-to-unstable.rs b/src/test/ui/proc-macro/expand-to-unstable.rs
new file mode 100644
index 000000000..0825c1a8e
--- /dev/null
+++ b/src/test/ui/proc-macro/expand-to-unstable.rs
@@ -0,0 +1,14 @@
+// aux-build:derive-unstable.rs
+
+#![allow(warnings)]
+
+#[macro_use]
+extern crate derive_unstable;
+
+#[derive(Unstable)]
+//~^ ERROR: use of unstable library feature
+struct A;
+
+fn main() {
+    unsafe { foo(); }
+}