ref: c6e8e33dc429495ac8a20e9a5d40f4ea2ceb787a
dir: /tests/NoForall.hs/
module NoForall where
-- Without an explicit forall the 'a' is not bound in the body.
f :: a -> ((a,a),(a,a))
f x =
  let g :: a -> (a,a)
      g a = (a,a)
  in  g (x,x)
main :: IO ()
main = print (f True)