On the luaotfload tracker was a bug report that the loading of a font failed if too many character variant were requested https://github.com/lualatex/luaotfload/issues/424 I wanted to check if the problem still exist with a current fontloader. Here (both context and latex) the loading of this fonts fails even if no character variants at all are requested: \starttext \font\x={file:iosevka-type-slab-regular.ttf} \x ablub \stoptext gives ...ext/tex/texmf-context/tex/context/base/mkiv/font-oup.lua:2137: bad argument #1 to 'for iterator' (table expected, got nil) The font can be get from https://github.com/be5invis/Iosevka/releases it is in the 07-iosevka-type-slab-2.0.0.zip. -- Ulrike Fischer https://www.troubleshooting-tex.de/