1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/T15883d.hs b/testsuite/tests/typecheck/should_fail/T15883d.hs
new file mode 100644
index 0000000000..fd86c5cab3
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T15883d.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE UnliftedNewtypes #-}
+
+module T15883d where
+
+import GHC.Exts
+
+newtype Foo rep = MkFoo (forall (a :: TYPE rep). a)
+deriving stock instance Show (Foo LiftedRep)
+