tex4ht incompatible with expdlist

Question

I try to convert the below document with htlatex and no options and it spits this error on me:

! LaTeX Error: Something's wrong--perhaps a missing \item.

There's no error if I remove the square brackets and their contents behind the description environment. There's another error, if I only include one item:

! Missing number, treated as zero.
<to be read again> 
                   \c:\end:itm 
l.7   \end{description}

Minimal example:

\documentclass{article}
\usepackage{expdlist}
\begin{document}                                               
  \begin{description}[\breaklabel\setleftmargin{1ex}]
    \item[test1]text1
    \item[test2]text2
  \end{description}
\end{document}

Answer 1

This looks like a bug.

Here is an ugly workaround:

\usepackage{expdlist}
\begin{document}     
  \ifx\HCode\UnDef
  \begin{description}[\breaklabel\setleftmargin{1ex}]
  \else
  \begin{description}
  \fi
    \item[test1]text1
    \item[test2]text2
  \end{description}
\end{document}

Update: https://puszcza.gnu.org.ua/bugs/index.php?155

Update 2. The bug is closed. Until the patch travels to your system, just add the file expdlist.4ht to your work directory with the following contents:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% expdlist.4ht                          2011-11-20-04:55 %
% Copyright (C) 2007--2009       Eitan M. Gurari         %
%               2009--2011       TeX Users Group         %
%                                                        %
% This work may be distributed and/or modified under the %
% conditions of the LaTeX Project Public License, either %
% version 1.3c of this license or (at your option) any   %
% later version. The latest version of this license is   %
% in                                                     %
%   http://www.latex-project.org/lppl.txt                %
% and version 1.3c or later is part of all distributions %
% of LaTeX version 2005/12/01 or later.                  %
%                                                        %
% This work has the LPPL maintenance status "maintained".%
%                                                        %
% This Current Maintainer of this work                   %
% is the TeX4ht Project <tex4ht@tug.org>.                %
%                                                        %
% If you modify this program your changing its signature %
% with a directive of the following form will be         %
% appreciated.                                           %
%            \message{signature}                         %
%                                                        %
%                                        tex4ht@tug.org  %
%                             http://www.tug.org/tex4ht  %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\immediate\write-1{version 2011-11-20-04:55}
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any
% later version. The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions
% of LaTeX version 2005/12/01 or later.
%
% This work has the LPPL maintenance status "maintained".
%
% The Current Maintainer of this work
% is the TeX4ht Project <http://tug.org/tex4ht>.
%
% If you modify this program, changing the
% version identification would be appreciated.
%
%
% We just ignore optional arguments to description during ht run... 
%
\let\description@orig=\description
\def\description{\@ifnextchar[% ]
{\description@ht}{\description@orig}}
\def\description@ht[#1]{\description@orig}
\Hinput{expdlist}
\endinput

Answer 2

This works without any problems. The formating can be controlled with \Css{...} declarations.

\documentclass{article}
\usepackage{expdlist,lipsum}

\begin{document}                                               


\def\enditem{}
\def\enditemone{\Tg</dd>}

\ConfigureList{description}
    {\Tg<dl>}
    {\enditem\Tg</dl>}
    {\enditem\Tg<dt>}
    {\Tg</dt>\Tg<dd>\let\enditem\enditemone}

  \begin{description}[\breaklabel\setleftmargin{1ex}]
    \item[test1]\lipsum[1]
    \item[test2]\lipsum[2]
  \end{description}

\end{document}