1 files changed, 14 insertions, 0 deletions
diff --git a/testsuite/tests/saks/should_fail/T16826.hs b/testsuite/tests/saks/should_fail/T16826.hs
new file mode 100644
index 0000000000..60f305edef
--- /dev/null
+++ b/testsuite/tests/saks/should_fail/T16826.hs
@@ -0,0 +1,14 @@
+{-# LANGUAGE StandaloneKindSignatures #-}
+{-# LANGUAGE ConstraintKinds #-}
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE TypeFamilies #-}
+
+module T16826 where
+
+import Data.Kind
+
+type family Id (x :: Type) :: Type where
+  Id x = x
+
+type C :: Type -> Id Constraint
+class C a