RE: [Haskell] modern language design, stone age tools

This may not be the right answer to the question (which is of course lets write a debugger) - But I have never used a debugger, and find them more or less the most unfriendly and useless things You either end up single stepping through a million lines of code, or you find the error is of a complex non-localised kind anyway. I find inserting my own debug code into an application to be a much more fruitful way of keeping track of errors. Using conditional compiliation all this extra code can be removed from a finished app. The only problem with this approach in Haskell is that you sometimes have to lift a function into the IO monad for debugging... Keean.