Bug#672742: [tex-live] Bug#672742: (fwd) Bug#672742: /usr/bin/xetex: xetex fails to compile documents with defaultfontfeatures set

[Arthur Reutenauer <arthur.reutenauer@normalesup.org>]

	Hello again,

  About the Polyglossia bug: I still don't know exactly what's
happening, but I am now reasonably convinced that it happens within
Polyglossia's code (even though it's provoked by issuing fontspec
commands), and that defining \cyrillicfont will reliably work around the
problem -- see attachments.

  To be continued for a proper bugfix.

	Best,

		Arthur

\documentclass{article}
\usepackage{polyglossia}
\setmainlanguage{russian}
\defaultfontfeatures{Scale=MatchLowercase}
\setmainfont{Linux Libertine O}
\begin{document}
Привет Мир!
\end{document}

\documentclass{article}
\usepackage{polyglossia}
\setmainlanguage{russian}
\defaultfontfeatures{Scale=MatchLowercase}
\setmainfont{Linux Libertine O}
\newfontfamily\cyrillicfont[Script=Cyrillic]{Linux Libertine O}
\begin{document}
Привет Мир!
\end{document}