[NTG-context] Bad argument #1 to 'prehypenchar'

[Aditya Mahajan]

The following MWE gives an error with LMTX 2020.09.05


\usemodule[vim]
\definevimtyping[MATLABCODE][syntax=matlab]

\starttext
\startMATLABCODE
  saveas(gcf(), "output/same-sigma.png")
\stopMATLABCODE
\stoptext

The error message is:

callback error: ...metatex/texmf-context/tex/context/base/mkiv/lang-ini.lua:509: bad argument #1 to 'prehyphenchar' (luatex.lang expected, got no value)
stack traceback:
        [C]: in function 'lang.prehyphenchar'
        ...metatex/texmf-context/tex/context/base/mkiv/lang-ini.lua:509: in field 'prehyphenchar'
        ...metatex/texmf-context/tex/context/base/mkiv/typo-brk.lua:171: in local 'method'
        ...metatex/texmf-context/tex/context/base/mkiv/typo-brk.lua:392: in upvalue 'typesetters_breakpoints_handler'
        [string "local tonut  = nodes.tonut..."]:16: in function <[string "local tonut  = nodes.tonut..."]:11>
        (...tail calls...)
        ...metatex/texmf-context/tex/context/base/mkiv/node-pro.lua:88: in function <...metatex/texmf-context/tex/context/base/mkiv/node-pro.lua:79>

1 >>  \SYNBOL{}saveas(gcf(), \SYN[String]{"output/same-sigma.png"})\SYNEOL{}
2     
mtx-context     | fatal error: return code: 256

Any idea what is going on?

Thanks,
Aditya