1 files changed, 26 insertions, 0 deletions
diff --git a/testsuite/tests/indexed-types/should_compile/CoTest3.hs b/testsuite/tests/indexed-types/should_compile/CoTest3.hs
new file mode 100644
index 0000000000..971a464a89
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+++ b/testsuite/tests/indexed-types/should_compile/CoTest3.hs
@@ -0,0 +1,26 @@
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE GADTs #-}
+
+-- This test uses the PushC rule of the System FC operational semantics
+-- Writen by Tom Schrijvers
+
+module CoTest3 where 
+
+data T a = K (a ~ Int => a -> Int) 
+
+
+{-# INLINE[2] f #-}
+f :: T s1 ~ T s2 => T s1 -> T s2
+f x = x
+
+{-# INLINE[3] test #-}
+test :: T s1 ~ T s2 => (s1 ~ Int => s1 -> Int) -> (s2 ~ Int => s2 -> Int) 
+test g = case f (K g) of
+           K r -> r
+e :: s ~ Int => s -> s -> Int
+e _ s = s
+
+final :: s1 ~ s2 => s1 -> (s2 ~ Int => s2 -> Int)
+final x = test (e x)