5

The following code does not compile:

\documentclass[11pt]{article}
\usepackage{calc}
\usepackage{siunitx}
\begin{document}
\begin{tabular}{p{.5cm}p{\widthof{\textbf{AAAAAAAAA}}}l}
&\textbf{AAAAAAAAA}&XXXXXXXXXXXXXXXXXXXXXX\\
&\textbf{BBBBB}&YYYYYYYYYYYYYYYYYYYYYYY\\
\end{tabular}
\end{document}

However, it does compile, when the line

\usepackage{siunitx}

is omitted. Interchanging the loading order of the packages does not help.

Error message:

! Undefined control sequence.
\GenericError ...
#4 \errhelp \@err@ ...
l.5 ...r}{p{.5cm}p{\widthof{\textbf{AAAAAAAAA}}}l}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
2
  • 4
    It is no siunitx but array (loaded by siunitx). It changes the way tabular preambles are handled. – Ulrike Fischer Nov 10 '18 at 9:10
  • 2
    The main problem is the fragile \textbf. You can robustify it \usepackage{etoolbox}\robustify\textbf. – Ulrike Fischer Nov 10 '18 at 9:34
5

array package should probably have made this safe, one way to patch it is

    \documentclass[11pt]{article}
    \usepackage{calc}
    \usepackage{array}
    \usepackage{etoolbox}
\makeatletter
    \patchcmd \@mkpream
       {\let\@sharp\relax}
       {\def\widthof##1{\unexpanded{\widthof{##1}}}\let\@sharp\relax}
       {}{}
\makeatother
    \begin{document}
    \begin{tabular}{p{.5cm}p{\widthof{\textbf{AAAAAAAAA}}}l}
    &\textbf{AAAAAAAAA}&XXXXXXXXXXXXXXXXXXXXXX\\
    &\textbf{BBBBB}&YYYYYYYYYYYYYYYYYYYYYYY\\
    \end{tabular}
    \end{document}
4
  • I have now added a fix to the array package (somewhat more general than the above). The next release of LaTeX's tools (planned for December 2018) will contain this. – Frank Mittelbach Nov 13 '18 at 23:18
  • @FrankMittelbach Unfortunately, it seems to break xcolor: \documentclass{article} \RequirePackage[table]{xcolor} \RequirePackage{array} \begin{document} \begin{tabular}{>{\centering}p{4cm}|p{4cm}} Test \end{tabular} \end{document} – cjorssen Dec 13 '18 at 20:35
  • @cjorssen that's the table option so colortbl (which did get broken) a new version of colortbl went to ctan yesterday so should be in distributions probably tomorrow – David Carlisle Dec 13 '18 at 21:17
  • @DavidCarlisle This morning: update: colortbl [593k] (47614 -> 49404) ... done. Thank you so much for being so quick to fix things. – cjorssen Dec 14 '18 at 8:03

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