On Sun, Sep 27, 2009 at 3:50 PM, Paul Moore <p.f.mo...@gmail.com> wrote:

> The problem is that I have *no idea* how to begin debugging this.

I've had great success debugging a large program by loading the Main
module into ghci after setting GHC extensions, changing the search
path, and setting break on errors.  If you then place calls to the
error function at the right location, and trace the execution, you'll
be able to get a stack trace of the context in which the error
function was called.

John
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