Lualatex problem with unicode-math package

After the last MikTeX upgrade (8/9/2015), the package unicode-math cannot be run with
LuaLaTeX. 

 

Running a simple example

 

-------------------------------------------------------------------

\documentclass[final,a4paper]{article} 

\usepackage{luaotfload}

\usepackage{luatex,luatextra,lualatex-math}% 

\defaultfontfeatures{Ligatures=TeX}% 

\usepackage{unicode-math} 

\setmathfont[math-style=TeX]{Cambria Math} 

%

\begin{document}

ABC 

\end{document}

-----------------------------------------------------------

 

one gets the following error:

 

-----------------------------------------------------------

.

. 

Runaway argument?

\prg_do_nothing: \cs_gset_eq:NN \backslash \'::\exp_not:N 

! File ended while scanning use of \__tl_rescan:w.

<inserted text> 

\par 

l.8 \begin{document}

-----------------------------------------------------------

 

Regards, 

Bohdan

 

 

 

 

 

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