[luatex] Misplaced letter

[Javier Bezos]

I'm glad to see luatofload will be, at last, updated
(thank you, Ulrike), but to be honest, I'm still worried
about how it will evolve in the future and whether new
features added by Hans in luatex-plain/context (eg, Indic
scripts) will find its way into luaotfload in a reasonable
time.

Of course, I'm willing to help and to prepare some test
files.

     *    *    *

Below is a minimal file in luatex (ie, plain) showing
the problem in luaotfload. It requires FreeSerif and Arabic
Typesetting, but the latter is not essential, because
FreeSerif already shows the problem. See the following
images:

http://texnia.com/archive/luatex-plain.png

http://texnia.com/archive/luaotfload.png

As you can see, with the code for luatex-plain everything
is fine.

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

% Works with code for luatex-plain:
\input luatex-basics
\input luatex-fonts

% But with luaotfload some letters are misplaced:
% \input luaotfload.sty

\font\fs= FreeSerif:%
    mode=node;script=arab;+init;+medi;+fina;+rlig;

\font\at= [c:/Windows/Fonts/arabtype.ttf]:%
    mode=node;script=arab;+init;+medi;+fina;+rlig;

\textdir TRT \pardir TRT

\hsize 3cm

\fs % FreeSerif

الإشارات برهن

\leavevmode\hbox{الإشارات برهن}

\leavevmode\halign{#\cr الإشارات برهن\cr}

\at % Arabic Typesetting - wrong, too, but in different ways

الإشارات برهن

\leavevmode\hbox{الإشارات برهن}

\leavevmode\halign{#\cr الإشارات برهن\cr}

\bye
------------------------------------

Javier