<<loop>> in GHC 5.01 "Zarjaz"

[Mark Tehver]

Hi,

  The following code gives *** Exception: <<loop>> when I execute main
under ghci (using GHC 5.01 "Zarjaz"):

---- file Y.hs

module Y (test, T) where

data T k = T | S k deriving Show

test :: T k
test = T

---- file Main.hs

module Main (main) where

import Y

main :: IO ()
main = putStrLn $ show (test :: T Int)


But it works fine when I compile this program into stand-alone
executable using the same compiler. It also worked under Linux when I used
GHC 5.00 with interpreter.

Best regards,
Mark