1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/nested_type_alias_impl_trait.rs b/src/test/ui/type-alias-impl-trait/nested_type_alias_impl_trait.rs
new file mode 100644
index 000000000..60b6e1aac
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/nested_type_alias_impl_trait.rs
@@ -0,0 +1,20 @@
+#![feature(type_alias_impl_trait)]
+
+mod my_mod {
+    use std::fmt::Debug;
+
+    pub type Foo = impl Debug;
+    pub type Foot = impl Debug;
+
+    pub fn get_foo() -> Foo {
+        5i32
+    }
+
+    pub fn get_foot() -> Foot {
+        get_foo() //~ ERROR opaque type's hidden type cannot be another opaque type
+    }
+}
+
+fn main() {
+    let _: my_mod::Foot = my_mod::get_foot();
+}