我在我的f.lhs文件（$ lhs2Tex f.lhs > f.tex）上运行了lhs2Tex。它成功完成，创建了f.tex并且没有产生任何错误。
然而，当我运行$ pdflatex f.tex时，我得到（某些输出后跟）以下错误：
Runaway argument?
\ignorespaces \SaveRestoreHook \column {B}{@{}>{\hspre }l<{\hspost }@\ETC.
! File ended while scanning use of \PT@scantoend.
<inserted text>
\par
<*> core.tex
?
为什么lhs2Tex的输出无法编译为有效的tex？似乎lhs2Tex不应该生成无效的tex，即使输入无效。
我不确定调试此方法的最佳方法;我指向f.tex的错误消息，但这是一个很长的生成输出，而不是我编写的代码。在我的代码（f.lhs）中，我不知道从哪里开始，因为lhs2Tex将它发送到f.tex而没有任何错误或输出。
有关如何进行调试的任何建议吗？
编辑： 我在检查时删除了一堆生成的代码，以确保仍然会导致相同的错误。 这是剩下的;这个f.tex的最小化版本会导致同样的错误。
\documentclass{article}
%% ODER: format == = "\mathrel{==}"
%% ODER: format /= = "\neq "
%
%
\makeatletter
\@ifundefined{lhs2tex.lhs2tex.sty.read}%
{\@namedef{lhs2tex.lhs2tex.sty.read}{}%
\newcommand\SkipToFmtEnd{}%
\newcommand\EndFmtInput{}%
\long\def\SkipToFmtEnd#1\EndFmtInput{}%
}\SkipToFmtEnd
\newcommand\ReadOnlyOnce[1]{\@ifundefined{#1}{\@namedef{#1}{}}\SkipToFmtEnd}
\usepackage{amstext}
\usepackage{amssymb}
\usepackage{stmaryrd}
\newcommand{\tex}[1]{\text{\texfamily#1}} % NEU
\newcommand{\Sp}{\hskip.33334em\relax}
\usepackage{polytable}
%mathindent has to be defined
\@ifundefined{mathindent}%
{\newdimen\mathindent\mathindent\leftmargini}%
{}%
\def\resethooks{%
\global\let\SaveRestoreHook\empty
\global\let\ColumnHook\empty}
\newcommand*{\savecolumns}[1][default]%
{\g@addto@macro\SaveRestoreHook{\savecolumns[#1]}}
\newcommand*{\restorecolumns}[1][default]%
{\g@addto@macro\SaveRestoreHook{\restorecolumns[#1]}}
\newcommand*{\aligncolumn}[2]%
{\g@addto@macro\ColumnHook{\column{#1}{#2}}}
\resethooks
\newcommand{\visiblecomments}{%
\let\onelinecomment=\onelinecommentchars
\let\commentbegin=\commentbeginchars
\let\commentend=\commentendchars}
\visiblecomments
\newlength{\blanklineskip}
\setlength{\blanklineskip}{0.66084ex}
\EndFmtInput
\makeatother
%
%
%
%
%
%
% This package provides two environments suitable to take the place
% of hscode, called "plainhscode" and "arrayhscode".
%
% The plain environment surrounds each code block by vertical space,
% and it uses \abovedisplayskip and \belowdisplayskip to get spacing
% similar to formulas. Note that if these dimensions are changed,
% the spacing around displayed math formulas changes as well.
% All code is indented using \leftskip.
%
% Changed 19.08.2004 to reflect changes in colorcode. Should work with
% CodeGroup.sty.
%
\ReadOnlyOnce{polycode.fmt}%
\makeatletter
\newcommand{\hsnewpar}[1]%
{{\parskip=0pt\parindent=0pt\par\vskip #1\noindent}}
% can be used, for instance, to redefine the code size, by setting the
% command to \small or something alike
\newcommand{\hscodestyle}{}
% The command \sethscode can be used to switch the code formatting
% behaviour by mapping the hscode environment in the subst directive
% to a new LaTeX environment.
\newcommand{\sethscode}[1]%
{\expandafter\let\expandafter\hscode\csname #1\endcsname
\expandafter\let\expandafter\endhscode\csname end#1\endcsname}
% "plain" mode is the proposed default.
% It should now work with \centering.
% This required some changes. The old version
% is still available for reference as oldplainhscode.
\newenvironment{plainhscode}%
{\hsnewpar\abovedisplayskip
\advance\leftskip\mathindent
\hscodestyle
\let\hspre\(\let\hspost\)%
\pboxed}%
{\endpboxed%
\hsnewpar\belowdisplayskip
\ignorespacesafterend}
% Here, we make plainhscode the default environment.
\newcommand{\plainhs}{\sethscode{plainhscode}}
\newcommand{\oldplainhs}{\sethscode{oldplainhscode}}
\plainhs
%
\begin{document}
\begin{hscode}\SaveRestoreHook
\ColumnHook
\end{hscode}\resethooks
\end{document}
\end{document}