[texhax] unicode-math plus braket

[Arno Trautmann]

Hi all,

I just found out about a somewhat funny bug …
Consider the following document:

\documentclass{scrartcl}

\usepackage{
  braket,
  unicode-math
}

%\setmathfont{xits-math}

\begin{document}
test
\begin{figure}
\caption{$\ket{}$}
\end{figure}

\listoffigures
\end{document}

This works fine on every run. Now taking \setmathfont, the first run is ok, but the second one crashes when \listoffigures tries to typeset the lof:

./test.lof:1: Undefined control sequence.
<argument> ...$\mathinner {|{}\Udelimiter 5\symum 
                                                  _allsym "027E9\scan _stop:...
l.1 ... 5\symum _allsym "027E9\scan _stop: }$}}{1}
                                                  
? 

This error stays until the lof is deleted, even when commenting out setmathfont and unicode-math. It happens also with Asana Math, so seems not to be font-related. The \ket in the caption is fine, though.

Now … can anybody explain this to me? Or even provide a solution? ;)
A first guess: A problem with expl3 names when reading the .lof file (wrong catcode of _)?

cheers
Arno
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