[Haskell-cafe] Segmentation fault with realdine library

Hi, This small program says "Segmentation fault": module Main (Main.main) where import Data.Char import System.Time import System.Console.Readline main :: IO () main = do readKey return () I don't understand anything about readline, so I probably should have to call some function before readKey (by they way, I don't know what readKey does). But I thought a segmentation fault is always something to be reported. Best, Maurício