[luatex] Wrong placement of \int\limits in Lua(La)TeX

[Simon May]

Hello,

with unicode-math and LuaLaTeX, the placement of the limits using
\int\limits is incorrect. The limits are placed too far to the right. As
discussed in the comments at
https://tex.stackexchange.com/a/103925/51235
this issue does not occur with XeTeX. There is also a bug at
http://tracker.luatex.org/view.php?id=729
that might refer to this same issue. Is this indeed a bug in LuaTeX and
are there perhaps any workarounds?
I'm using LuaTeX beta-0.79.1 (TeX Live 2014/Debian) (rev 4971).

Below is a demonstration of this issue. Producing the document will show
the incorrect placement of the limits. Removing the line
"\usepackage{unicode-math}" will show the expected output.


\documentclass{scrartcl}
\usepackage{unicode-math}
\begin{document}
\[
	\int_a^b
	\int\limits_a^b
\]
\end{document}


Out of interest: Using unicode-math (even without limits) does not
produce the same output in the example as the same document without
unicode-math. The the size of the integral sign and the spacing of the
limits changes slightly. Is this intended/expected?

Regards,
Simon May
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