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diff --git a/testsuite/tests/generics/GenCannotDoRep1_6.hs b/testsuite/tests/generics/GenCannotDoRep1_6.hs
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+{-# LANGUAGE DeriveGeneric #-}
+
+module GenCannotDoRep1_6 where
+
+import GHC.Generics
+
+-- We do not support occurrences of the type variable except as the last
+-- argument: == (->) ((->) a Int) Int
+data T a = T ((a -> Int) -> Int) deriving Generic1