Re: [Haskell-cafe] src/Text/XML/HaXml/Lex.hs:(156, 0)-(160, 22): Non-exhaustive patterns in function white

Judging solely by the error message (non-exhaustive patterns in 'white'), it sounds like it could be a bug in HaXml that was fixed in a patch of April 2009. Try using a more recent release of HaXml. Regards, Malcolm