1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs b/tests/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs
new file mode 100644
index 000000000..9d938a616
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/generic_duplicate_lifetime_param.rs
@@ -0,0 +1,14 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+pub trait Captures<'a> {}
+
+impl<'a, T: ?Sized> Captures<'a> for T {}
+
+type Two<'a, 'b> = impl std::fmt::Debug + Captures<'a> + Captures<'b>;
+
+fn one<'a>(t: &'a ()) -> Two<'a, 'a> {
+    t
+    //~^ ERROR non-defining opaque type use
+}