This used to work:

\definefontfallback[seguiFB]
  [file:seguisym.ttf]
  [0x00000-0xFFFFF]
  [check=yes,force=no]

\definetypeface [contextstart] [ss] [sans] [segoe] [default][fallbacks=seguiFB]

(Intention is to take all missing characters from this symbol font.)


But with current LMTX, I get:



tex error       > tex error on line 48 in file env_contextstart.tex:

lua error:

registered function call [1145]: ...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:2339: attempt to perform arithmetic on a nil value (field 'depth')
stack traceback:
...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:2339: in local 'action' ...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:3166: in upvalue 'applytweaks' ...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:3200: in upvalue 'mathematics_tweakaftercopyingfont' [string "local mathematics_tweakaftercopyingfont = mat..."]:5: in local 'runner' ...-14/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:504: in field 'aftercopyingcharacters' ...-14/tex/texmf-context/tex/context/base/mkxl/font-con.lmt:859: in field 'scale' ...-14/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:672: in function <...-14/tex/texmf-context/tex/context/base/mkxl/font-otl.lmt:664>
        (...tail calls...)
...-14/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:378: in function <...-14/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:366>
        (...tail calls...)
...-14/tex/texmf-context/tex/context/base/mkxl/font-def.lmt:484: in field 'read' ...-14/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1371: in function <...-14/tex/texmf-context/tex/context/base/mkxl/font-ctx.lmt:1228>
        (...tail calls...)      

43     \usetypescriptfile[contextstart]
44     \usebodyfont[modern]
45     \usebodyfont[cambria]
46     \usebodyfont[segoe]
47
48 >>  \setupbodyfont[contextstart,10pt]


Hraban
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