[texhax] Black box in math mode with LuaLaTeX + koma script

[William F Hammond]

Stefan Löffler <stefan.loeffler at tuwien.ac.at> writes:

>  . . .  When typesetting the following minimal example,
>
> \documentclass{scrreprt}
> \pagestyle{empty}
> \begin{document}
>
> \[
> \sqrt{\sum_i \Bigg(}
> \]
> \end{document}
>
> with LuaLaTeX, the square root symbol is typeset above the rest of the math, with a
> large black box inside.  . . .

This code runs fine for me as it is using lualatex (the TeXLive 2010 version,
two years older than your version).  Are there any complaints about fonts in
your log?  (I'm seeing 3 size substitutions with cmex10.)

Small png screenshot attached.

                              -- Bill

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