1 files changed, 11 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/T17566c.hs b/testsuite/tests/typecheck/should_fail/T17566c.hs
new file mode 100644
index 0000000000..d7d68a050c
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T17566c.hs
@@ -0,0 +1,11 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE TypeFamilies #-}
+module T17566c where
+
+import Data.Kind
+
+class C2 f z where
+  type T2 (f :: k -> Type)
+  data D2 (x :: (f :: k -> Type) a)