1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/nested.rs b/src/test/ui/type-alias-impl-trait/nested.rs
new file mode 100644
index 000000000..6b866be7d
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/nested.rs
@@ -0,0 +1,17 @@
+#![feature(type_alias_impl_trait)]
+
+type Foo = impl std::fmt::Debug;
+type Bar = impl Trait<Foo>;
+
+trait Trait<T> {}
+
+impl<T, U> Trait<T> for U {}
+
+fn bar() -> Bar {
+    42
+}
+
+fn main() {
+    println!("{:?}", bar());
+    //~^ ERROR `Bar` doesn't implement `Debug`
+}