[lltx] [luatexbase] Change in the behaviour of \newluatexattribute ?

[Khaled Hosny]

After spending most of the day debugging why Arabic shaping is broken in
the luaotfload, it turned out to be an attribute issue. The first
allocated attribute by \newluatexattribute is 0 and ConTeXt code don't
seem to like that, it specifically expects attributes used in luaotfload
to be < 255 and > 127.

The problem didn't show before switch to luatexbase, so I expect there
was some change in how \newluatexattribute allocates new attributes.
Also, to avoid any other hidden surprises, is there a way for luaotfload
to assign attributes in the aforementioned range in a way that works
nicely with the attributes package?

Regards,
 Khaled

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer