[Haskell-cafe] Error in enumerator when using interpreter instead of compiler

[Tobias Brandt]

Hi all,
I was trying out the enumerator package. I wanted to copy the contents of
one file to another:

module Main where
import Data.Enumerator
import Data.Enumerator.IO

main = run (enumFile "foo" $$ iterFile "bar")

If I compile this code with GHC, it works as expected. But if I run it with
runhaskell I get the following error:
Left bar: hPutBuf: illegal operation (handle is closed)

If I replace the above code with this:

module Main where
import Data.Enumerator
import Data.Enumerator.IO
import System.IO

main = withBinaryFile "bar" WriteMode $ \h ->
    run (enumFile "foo" $$ iterHandle h)

It works both compiled and interpreted.

Is this a bug in enumerator (probably in the iterFile function) or a
deficiency of the interpreter?
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