Am Wed, 12 Jul 2017 11:33:22 +0200 schrieb Hans Hagen:
(But I don't know if it is really a bug in the font as xelatex with harfbuzz has no problems.)
I don't know what harfbuzz does but the font definitely does some ssty mapping to rather simple glyphs with no extensible parts so basically it's a font bug. If xetex catches it, find but it's still a bug. Anyway, the previous mail with the patch checks for al three 'missing' fields so this is basically the same issue. If not, let me know.
I will check the code in the evening (and also try out if I can inject it in luaotfload). But on the whole I tried to avoid to work around bugs too much - in the end one pay with too complicated code. If it is a font bug then one should try to resolve the issue there. -- Ulrike Fischer http://www.troubleshooting-tex.de/