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+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE MagicHash #-}
+{-# LANGUAGE TypeApplications #-}
+module Bug where
+
+import GHC.Exts
+import Unsafe.Coerce
+
+f :: Int -> Int
+f x = unsafeCoerce# @LiftedRep @LiftedRep @Int @Int x
+