eqnarray environment changed into align*

[smihael]

Changes in eqnarray environments are changed to align* environments when diffed.

old.tex:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
Some text:
\begin{eqnarray}
a &=& 1 + 2, \label{eq:a}\\
b &=& 3 + 4, \label{eq:b}
\end{eqnarray}
Some additional text:
\begin{eqnarray}
c &=& 1 + 2, \label{eq:c}\\
d &=& 3 + 4, \label{eq:d}
\end{eqnarray}
\end{document}

new.tex:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\end{document}

Generated diff of the eqnarray environment:

 \DIFdelbegin \DIFdel{Some text:
}\begin{align*}
\DIFdel{a }&\DIFdel{=}& \DIFdel{1 + 2, \label{eq:a}}\\
\DIFdel{b }&\DIFdel{=}& \DIFdel{3 + 4, %DIFDELCMD < \label{eq:b}%%%
}\end{align*}%DIFAUXCMD
\DIFdel{Some additional text:
}\begin{align*}
\DIFdel{c }&\DIFdel{=}& \DIFdel{1 + 2, \label{eq:c}}\\
\DIFdel{d }&\DIFdel{=}& \DIFdel{3 + 4, %DIFDELCMD < \label{eq:d}%%%
}\end{align*}%DIFAUXCMD
%DIFDELCMD <  %%%
\DIFdelend

The generated code won't compile with error "Package amsmath Error: Multiple \label's: label 'eq:a' will be lost. }\end{align}" My current workaround is to manually replace all occurrences of align back to eqnarray.

I'm using LATEXDIFF 1.3.0 (Algorithm::Diff 1.15 fast, Perl v5.30.0) shipped with KDE neon (Ubuntu 18.04 derivative).

[quentin-ag]

I face the same bug with the gather environment (instead of eqnarray), and the version 1.3.1.1 of latexdiff.

[ftilmann]

This issue has been fixed with commit 12ddc9e660fca68b8ab45fc4a074f66d81576be1 and will be available in versions 1.3.3 and higher