1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/T22570.hs b/testsuite/tests/typecheck/should_fail/T22570.hs
new file mode 100644
index 0000000000..25a54aa29b
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/T22570.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE QuantifiedConstraints #-}
+module T22570 where
+
+import Data.Kind
+
+class SomeClass a
+class OtherClass
+
+type SomeClassUnit = OtherClass => SomeClass () :: Constraint
+
+instance SomeClassUnit
+
+type SomeClassSyn a = OtherClass => SomeClass a :: Constraint
+
+instance SomeClassSyn ()