[Haskell-cafe] Strange behaviour with writeFile
cmb21 at kent.ac.uk
Sun Feb 4 10:55:38 EST 2007
I am observing some rather strange behaviour with writeFile.
Say I have the following code:
answer <- AbstractIO.readFile "filename"
let (answer2, remainder) = parseAnswer answer
if remainder == "" && answer2 == ""
AbstractIO.putStrLn $ "completed"
AbstractIO.writeFile "filename" remainder
With the above I get an error saying the resources to "filename" are
locked. If I add the line "AbstractIO.putStrLn $ show (answer2, remainder)
before I call writeFile it suddenly magically works!
Has anyone seen strange behaviour like this before?
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