1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/impl_trait_for_tait.rs b/src/test/ui/type-alias-impl-trait/impl_trait_for_tait.rs
new file mode 100644
index 000000000..9f32c5d88
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/impl_trait_for_tait.rs
@@ -0,0 +1,21 @@
+// compile-flags: --crate-type=lib
+// check-pass
+
+#![feature(type_alias_impl_trait)]
+type Alias = impl Sized;
+
+fn constrain() -> Alias {
+    1i32
+}
+
+trait HideIt {
+    type Assoc;
+}
+
+impl HideIt for () {
+    type Assoc = Alias;
+}
+
+pub trait Yay {}
+
+impl Yay for <() as HideIt>::Assoc {}