# Cannot typeset cyrillic text in italics and bold at the same time using the LinuxLibertine font

I cannot tell if the following is a bug in the LinuxLibertine OTF files or if it is a bug in XeLaTeX (or both?). The problem is: when I try to typeset cyrillic text in italic and bold, the glyphs appearantly cannot be found in LinuxLibertine.

I have tried this with * my uptodate Arch Linux running TeXLive 2013, using the libertine package from my distribution, * the same TeXLive with freshly downloaded OTF files from the LinuxLibertine project, * a vanilla TeXLive 2014 as installed from tug.org together with the original Libertine OTF files.

Here is a minimal working example (expecting the OTF files in the current working directory; they can be downloaded from https://sourceforge.net/projects/linuxlibertine/files/linuxlibertine/5.3.0/):

\documentclass{article}
\usepackage{fontspec}
\begin{document}
\setmainfont[Path              = /path/to/linuxlibertine/,
Extension         = .otf,
BoldFont          = LinLibertine_RB,
ItalicFont        = LinLibertine_RI,
BoldItalicFont    = LinLibertine_RBI
]{LinLibertine_R}
\raggedright
Regular: положим\\
Bold: \textbf{положим}\\
Italic: \textit{положим}\\
Bold+Italic: \textit{\textbf{положим}}
\end{document}


The OTF files come straight out of LinLibertineOTF_5.3.0_2012_07_02.tgz. This is XeTeX 3.1415926-2.5-0.9999.3-2014042815 (TeX Live 2013/Arch Linux). In the last line (Bold+Italic), for each cyrillic glyph I see something like a crossed out rectangle in the resulting PDF file. (When I use LuaLatex I see nothing where the Bold+Italic glyphs should appear.)

As I said, I cannot tell if this is a bug in LinuxLibertine or in XeTeX. I would be happy about any pointers/workarounds, as I wish to have this fixed soon.

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Apparently Linux Libertine lacks the Cyrillic alphabet in the bold italic font, but it has it in the semibold italic font. So a workaround is to use semibold instead of bold:

\documentclass{article}
\usepackage{fontspec}
\begin{document}
\setmainfont[
Path              = /usr/local/texlive/2014/texmf-dist/fonts/opentype/public/libertine/,
Extension         = .otf,
BoldFont          = LinLibertine_RZ,
ItalicFont        = LinLibertine_RI,
BoldItalicFont    = LinLibertine_RZI,
]{LinLibertine_R}
\raggedright
Regular: положим\\
Bold: \textbf{положим}\\
Italic: \textit{положим}\\
Bold+Italic: \textit{\textbf{положим}}
\end{document}


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