1 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/T16204c.hs b/testsuite/tests/typecheck/should_fail/T16204c.hs
new file mode 100644
index 0000000000..97318a5729
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T16204c.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeFamilies #-}
+module T16204c where
+
+import Data.Kind
+
+data family Sing :: forall k. k -> Type
+type family Rep  :: Type
+
+sTo :: forall (a :: Rep). Sing a
+sTo = sTo
+
+x :: forall (a :: Type). Sing a
+x = id sTo