1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/derive-helper-shadowing.rs b/src/test/ui/proc-macro/derive-helper-shadowing.rs
new file mode 100644
index 00000000000..aa9eae0ba31
--- /dev/null
+++ b/src/test/ui/proc-macro/derive-helper-shadowing.rs
@@ -0,0 +1,10 @@
+// aux-build:derive-helper-shadowing.rs
+
+extern crate derive_helper_shadowing;
+use derive_helper_shadowing::*;
+
+#[my_attr] //~ ERROR `my_attr` is ambiguous
+#[derive(MyTrait)]
+struct S;
+
+fn main() {}