[lltx] Problems with fontspec and ligatures

[Ulrike Fischer]

I downloaded today a new luaotfload from the link mentioned in issue
72 as I had this problem too:
https://github.com/lualatex/luaotfload/issues/72

Now if I run this document in a texlive 2013 pretest updated today:

\documentclass{book}
\usepackage{fontspec}
\usepackage{ifluatex}
\begin{document}
\fontspec[Ligatures=NoCommon]{Latin Modern Roman}
off fit fly office baffle

\ifluatex
\font\test="file:lmroman10-regular.otf:mode=node;script=latn;language=DFLT;+liga;"
\test off fit fly office baffle

\font\test="file:lmroman10-regular.otf:mode=node;script=latn;language=DFLT;-liga;"
\test off fit fly office baffle

\font\test="file:lmroman10-regular.otf:mode=node;-liga;"
\test off fit fly office baffle
\fi
\end{document}

I get

Font LatinModernRoman does not contain any OpenType `Script'
information.
...............................................

fontspec warning: "icu-feature-not-exist-in-font"
* 
* OpenType
feature 'Ligatures=NoCommon' (-liga) not available for font
*
'LatinModernRoman' with script '' and language ''.


And the ligatures are not disabled (NoCommon doesn't work).

With xelatex there is no problem. 

Also calling the fonts with the low-level commands works as
expected. So imho it is a fontspec problem ;-).


-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/