1 files changed, 11 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs b/src/test/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs
new file mode 100644
index 000000000..c9b9e128f
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs
@@ -0,0 +1,11 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+type Two<'a, 'b> = impl std::fmt::Debug;
+
+
+fn one<'a>(t: &'a ()) -> Two<'a, 'a> {
+    t
+    //~^ ERROR non-defining opaque type use
+}