URL:
<http://puszcza.gnu.org.ua/bugs/?423>
Summary: \left and \right inside caption with label cause TeX
capacity exceeded when used with hyperref
Project: tex4ht
Submitted by: tv4fun
Submitted on: Fri 24 May 2019 04:39:57 PM EEST
Category: None
Priority: 5 - Normal
Severity: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
_______________________________________________________
Details:
Recently when trying to convert a scientific paper to an eBook using tex4ht, I
ran into some confusing errors. I tracked it down to a macro that used \left
and \right inside of the caption of a labeled figure, which only seems to be a
problem with hyperref included. A simple example to reproduce this:
\documentclass{article}
\usepackage{hyperref}
\begin{document}
\begin{figure}
\caption{$\left(A\right)$}
\label{a}
\end{figure}
\end{document}
When compiled with `mk4ht htlatex main2.tex`, this gives:
--- file main2.css ---
[1
] [2
]
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <7> on input line 8.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <5> on input line 8.
l. 8 Writing main2.idv[1] (main20x.png)
! TeX capacity exceeded, sorry [input stack size=20000].
\Picture ->\leavevmode
\futurelet \:temp \:img
l.9 \label{a}
If you really absolutely need more capacity,
you can ask a wizard to enlarge me.
Here is how much of TeX's memory you used:
7621 strings out of 492617
101793 string characters out of 6129507
880460 words of memory out of 5000000
11452 multiletter control sequences out of 15000+600000
3808 words of font info for 15 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
20000i,5n,11428p,758b,465s stack positions out of
20000i,500n,20000p,200000b,80000s
Output written on main2.dvi (2 pages, 9752 bytes).
Interestingly, a small change to \thefigure results in a completely different
error:
\documentclass{article}
\usepackage{hyperref}
\begin{document}
\renewcommand{\thefigure}{S\arabic{figure}}
\begin{figure}
\caption{$\left(A\right)$}
\label{a}
\end{figure}
\end{document}
Now gives:
(./main2.aux) [1] [2]
! You can't use `\relax' after \the.
<recently read> \c@
l.10 \label{a}
?
This only seems to happen with the very specific combination of factors I have
outlined above. Not including \left and \right, not having them inside a
\caption, not having the \label, or not including \hyperref all seem to make
this go away, and it compiles with regular LaTeX just fine. I'm afraid I don't
know enough about the macros you're using to be able to debug this.
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<http://puszcza.gnu.org.ua/bugs/?423>
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