Haskell: internal error

[ricbit]

Hi, I'm using SPOJ to learn Haskell, I already got many problems working flawlessly.
However I tried to make KPEQU and got an "internal error".
Could you please check if there's anything wrong with the haskell environment?
My submission is the 764687, it runs fine at home using ghc 6.6

[noix]

Hi, I'm using SPOJ to learn Haskell, I already got many problems working flawlessly.
However I tried to make KPEQU and got an "internal error".

It was a glitch on SPOJ's side.
Your solution has been rejudged and it got "AC".

Sorry for the problem, I'll look into what could cause it.

[herrmann]

I also got an "internal error" when submitting TEST

module SPOJ.TEST where
import System.IO
main = do l <- getLine
          case l of
            "42" -> hClose stdin
            _    -> do putStrLn l
                       main

Is it because of hClose ?

[noix]

I also got an "internal error" when submitting TEST

[code]module SPOJ.TEST where

import System.IO

main = do l <- getLine
case l of
"42" -> hClose stdin
_ -> do putStrLn l
main[/code]

Is it because of hClose ?

"Internal error" was a result of ghc not generating any output for this code.
It was updated to instead exit with:

[1 of 1] Compiling SPOJ.TEST        ( /tmp/tested.hs, /tmp/tested.o )
Warning: output was redirected with -o, but no output will be generated
because there is no Main module.

I think that now it's informative enough...

I don't know Haskell, but I bet it's "module" that breaks it
Note that there's a working "TEST" solution in this forum - you might want to compare it with yours.

[mrd]

That's right. use "module Main ..."

ghc allows you to change this on the command line, but why make things more complicated.

Alternatively, you can simply drop the module line, and it will assume "Main".