[Haskell-cafe] Debugging methods for haskell

Thomas Schilling nominolo at googlemail.com
Thu Jul 16 04:56:20 EDT 2009

2009/7/16 Marc Weber <marco-oweber at gmx.de>
> I recall there was another method. Yeah, I even found it (using ghci and
> set -fbreak-on-exception)
> http://donsbot.wordpress.com/2007/11/14/no-more-exceptions-debugging-haskell-code-with-ghci/

Careful, better use -fbreak-on-error rather than -fbreak-on-exception.  Some
functions, e.g. 'doesFileExist', use exceptions internally and you might end
up stopping at an exception that is benign. (Identifying the exception has
become a little harder since we got extensible exceptions.)

Push the envelope.  Watch it bend.
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