1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/bound_reduction2.rs b/tests/ui/type-alias-impl-trait/bound_reduction2.rs
new file mode 100644
index 000000000..0bcc9e002
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/bound_reduction2.rs
@@ -0,0 +1,18 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+trait TraitWithAssoc {
+    type Assoc;
+}
+
+type Foo<V> = impl Trait<V>;
+
+trait Trait<U> {}
+
+impl<W> Trait<W> for () {}
+
+fn foo_desugared<T: TraitWithAssoc>(_: T) -> Foo<T::Assoc> {
+    ()
+    //~^ ERROR expected generic type parameter, found `<T as TraitWithAssoc>::Assoc`
+}