Bug#1078256: latexdiff: slight modification to a length passed to \raisebox results in diff output that does not compile

[Manny]

Package: latexdiff
Version: 1.3.2-1
Severity: normal
Tags: upstream
X-Debbugs-Cc: tilm...@gfz-potsdam.de, debbug.latexd...@sideload.33mail.com

An old version has text like this:

  \raisebox{-4\baselineskip}{\begin{minipage}…\end{minipage}}

A new version has instead:

  \raisebox{-5\baselineskip}{\begin{minipage}…\end{minipage}}

This results in diff output that latexpdf chokes on. Sample input
files are attached.

-- System Information:
Debian Release: 12.5
  APT prefers stable-updates
  APT policy: (990, 'stable-updates'), (990, 'stable-security'), (990, 
'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-28-amd64 (SMP w/2 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages latexdiff depends on:
ii  perl  5.36.0-7+deb12u1

Versions of packages latexdiff recommends:
ii  texlive-latex-base         2022.20230122-3
ii  texlive-latex-extra        2022.20230122-4
ii  texlive-latex-recommended  2022.20230122-3
ii  texlive-plain-generic      2022.20230122-4

Versions of packages latexdiff suggests:
ii  git  1:2.39.2-1.1

-- no debconf information

\documentclass{minimal}

\usepackage[UKenglish,dutch]{babel}

\begin{document}

This sample document demonstrates a latexdiff defect whereby
a slight change to a length passed to raisebox results in an uncompilable diff.\\

\noindent\begin{minipage}[b]{0.32\textwidth}\selectlanguage{dutch}
  blurb of Dutch text here.%
\end{minipage}\hfill%
\raisebox{-4\baselineskip}{%
  \begin{minipage}[b]{0.36\textwidth}
  \rule{\textwidth}{\textwidth}%
\end{minipage}}\hfill%
\noindent\begin{minipage}[b]{0.28\textwidth}\selectlanguage{UKenglish}
   blurb of English text here.%
\end{minipage}%

\end{document}

\documentclass{minimal}

\usepackage[UKenglish,dutch]{babel}

\begin{document}

This sample document demonstrates a latexdiff defect whereby
a slight change to a length passed to raisebox results in an uncompilable diff.\\

\noindent\begin{minipage}[b]{0.32\textwidth}\selectlanguage{dutch}
  altered blurb of Dutch text here.%
\end{minipage}\hfill%
\raisebox{-5\baselineskip}{%
  \begin{minipage}[b]{0.36\textwidth}
  \rule{\textwidth}{\textwidth}%
\end{minipage}}\hfill%
\noindent\begin{minipage}[b]{0.28\textwidth}\selectlanguage{UKenglish}
   altered blurb of English text here.%
\end{minipage}%

\end{document}