1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/indexed-types/should_fail/T2203a.hs b/testsuite/tests/indexed-types/should_fail/T2203a.hs
new file mode 100644
index 0000000000..89ed37e3da
--- /dev/null
+++ b/testsuite/tests/indexed-types/should_fail/T2203a.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE ScopedTypeVariables, TypeFamilies, FlexibleInstances #-}
+
+module T2203a where
+
+class Foo a where
+   type TheFoo a
+   foo :: TheFoo a -> a
+   foo' :: a -> Int
+
+class Bar b where
+   bar :: b -> Int
+
+instance Foo a => Bar (Either a (TheFoo a)) where
+   bar (Left a) = foo' a
+   bar (Right b) = foo' (foo b :: a)