1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/rep-poly/UnliftedNewtypesCoerceFail.hs b/testsuite/tests/rep-poly/UnliftedNewtypesCoerceFail.hs
new file mode 100644
index 0000000000..f5fd1092ca
--- /dev/null
+++ b/testsuite/tests/rep-poly/UnliftedNewtypesCoerceFail.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE MagicHash #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE TypeInType #-}
+{-# LANGUAGE UnliftedNewtypes #-}
+
+module Goof where
+
+import GHC.Exts (coerce)
+import GHC.Types (RuntimeRep,TYPE,Coercible)
+
+goof :: forall (rep :: RuntimeRep) (x :: TYPE rep) (y :: TYPE rep).
+  Coercible x y => x -> y
+goof = coerce