Math operator names with Neo Euler in XeLaTeX

This seems to work (I don't have Linux Libertine G, though):

\documentclass{article}
\usepackage{unicode-math}
\setmainfont{Linux Libertine O}
\setsansfont[Scale=MatchLowercase]{Liberation Sans}
\setmathfont[Scale=MatchLowercase]{Neo Euler}
\setmathfont[Scale=MatchLowercase,range=\mathit]{Neo Euler}
\setmathfont[range=\mathup]{Linux Libertine O}
\setmathfont[range=\mathbfup]{Linux Libertine O Bold}
\begin{document}
log $\log \mathrm{log}\mathbf{log}a+b\sum\int\alpha$
\end{document}