Mangled verbatim line environment

[jpbrucker]

It seems like commit 761ce840112c ("added standard styles for verbatim markup") introduced a regression on some verbatim environments. I first noticed this with lstlistings but could reproduce the issue using verbatim. When doing a diff of the following files with latexdiff 1.3.0, the resulting .tex doesn't compile.

verbatim-1.tex

\documentclass{report}
\begin{document}
\begin{verbatim}
1
\end{verbatim}
\begin{verbatim}
2
\end{verbatim}
\end{document}

verbatim-2.tex

\documentclass{report}
\begin{document}
\begin{verbatim}
3
\end{verbatim}
\end{document}

result.tex

...
\begin{document}
\DIFmodbegin
\begin{DIFverbatim}[alsolanguage=DIFcode]
%DIF < 1
\end{DIFverbatim}
\DIFmodend
%DIFDELCMD < \begin{verbatim}
%DIFDELCMD < %%%
%DIF < DIFVRB 2
\DIFdelend %DIF > DIFVRB 3
\end{verbatim}
\end{document}

Fails with:

! LaTeX Error: \begin{document} ended by \end{verbatim}.

git bisect pointed to commit 761ce840112c as the first one mangling the output

[ftilmann]

I can confirm this as a bug; thanks for finding the offending commit. Clearly something is going very wrong. Will require some investigation as I don't really want to roll back this commit, which is providing useful functionality and in most cases seems to work.

[ftilmann]

@jpbrucker not sure if you are still interested in this old thread, but I managed to fix the problem for the MWE (albeit with an additional empty line added, and change to the internal organisation of the verbatim environment. The fix is more a patch-up, but it did work for the MWE and didn't break any of the other test cases for verbatim environment. However, it might or might not work with more complicated documents, and might also have unwanted effects.

[jpbrucker]

Great, thanks for fixing it!