[NTG-context] Failure when loading variable font

14 Aug 2021

      Hi,

the latest ConTeXt version fails for the following
document:

    \definefontfeature
      [default:test]
      [default]
      [axis={Weight=100}]
    \definefont
      [SomeFont]
      [file:Fraunces.ttf*default:test]
    \starttext
    \SomeFont Abcdef
    \stoptext

and the font from
https://github.com/undercasetype/Fraunces/raw/master/fonts/Fraunces%5BSOFT%2...
renamed to Fraunces.ttf

with the error message

    otf reader      > user instance: weight=100, factors: 0 -1.0 0 0
    otf reader      > fatal error in file 'Fraunces.ttf': ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:274: attempt to index a nil value (local 'p1')
    stack traceback:
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2339: in metamethod 'index'
	    ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:274: in upvalue 'applyaxis'
	    ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:1428: in field 'gvar'
	    ...e0dde776fb1556f32e/formats/luametatex/font-ttf-macro.lua:1155: in local 'reader'
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2084: in upvalue 'readtable'
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2197: in upvalue 'readdata'
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2252: in function <...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2235>
	    [C]: in function 'xpcall'
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2341: in upvalue 'loadfont'
	    ...e0dde776fb1556f32e/formats/luametatex/font-otr-macro.lua:2396: in field 'loadfont'
	    ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:160: in field 'load'
	    ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:599: in upvalue 'otftotfm'
	    ...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:627: in function <...mtx/tex/texmf-context/tex/context/base/mkiv/font-otl.lua:626>
	    (...tail calls...)
	    ...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:377: in function <...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:365>
	    (...tail calls...)
	    ...mtx/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:483: in field 'read'
	    ...mtx/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1336: in function <...mtx/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1193>
	    (...tail calls...)
    fonts           > otf loading > loading failed due to read error

(This run used luametatex, but the same issue occurs when using luatex)
The same font worked correctly with the ConTeXt version from 2021-05-20.

Best regards,
Marcel

[NTG-context] Failure when loading variable font

Marcel Krüger