Overlapping instances for GHC.Show.Show (a -> a)
  arising from a use of `M1448851933.show_M1448851933'
               at <interactive>:(2,0)-(4,33)
Matching instances:
  instance (Data.Typeable.Typeable a, Data.Typeable.Typeable b) =>
           GHC.Show.Show (a -> b)
    -- Defined in show-0.3.4:ShowFun
  instance (Test.SmallCheck.Serial a,
            GHC.Show.Show a,
            GHC.Show.Show b) =>
           GHC.Show.Show (a -> b)
    -- Defined in smallcheck-0.4:Test.SmallCheck
...