[Haskell-cafe] Re: A GHC error message puzzle

On 12/08/10 15:09, Yitzchak Gale wrote:

The file "error_puzzle.hs" begins like this:

main = do inp<- readFile "input" writeFile "output" $ process inp

process :: String -> String

When compiled with GHC 6.12.3 and run, it gives the following result:

$ ./error_puzzle error_puzzle: output: hClose: illegal operation (handle is finalized)

process xs = blackhole where blackhole = tail blackhole Cheers, Simon