Re: Error: attempt to index a nil value

[Hans Hagen via ntg-context <ntg-context@ntg.nl>]

On 10/13/2021 6:54 PM, Hans Åberg wrote:
> 
>> On 13 Oct 2021, at 18:37, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>
>> On 10/13/2021 6:01 PM, Hans Åberg via ntg-context wrote:
>>> I was suggested a long ago to hack the file
>>>   /usr/local/texlive/2021/texmf-dist/tex/generic/context/luatex/luatex-math.tex
>>> and use LuaTeX directly, now using Version 1.13.2 (TeX Live 2021), but I get this error:
>>> (./luaotfload.sty
>>> (/usr/local/texlive/2021/texmf-dist/tex/latex/base/ltluatex.tex))
>>> (./luatex-math-modified.tex[\directlua]:1: attempt to index a nil value (global
>>> 'arguments')
>>> stack traceback:
>>> 	[\directlua]:1: in main chunk.
>>> l.132     }
>>> ? …
>>> It is from this segment in the modified luatex-math.tex:
>>> \ifdefined\directlua
>>>     \directlua {
>>>         if arguments["mtx:lucidabright"] then
>>>             tex.print("\string\\lucidabright")
>>>         else
>>>             tex.print("\string\\latinmodern")
>>>         end
>>>     }
>>> \fi
>>> Is there a workaround? —I may ditch this setup in favour of using 'context' directly, so it is not so important if there is no fix.
>> I have no clue ..
> 
> Has not stuff been moved from LuaTeX to ConTeXt? —If so, I thought it might have something with that to do.

luatex is just a tex engine and context is a macro package where context 
mkiv is geared for luatex; the context fontloader has a generic core so 
it can be used in plain and for latex some write a wrapper around that 
font hndler for latex that evolved over years

i have no clue why you get "(./luaotfload.sty ..." but it is not context 
that you run there (and i can't imagine some plain format loading it 
either)

>> it looks like you load a latex style so I suppose that 'arguments' is no longer defined there (as it worked for you in the past).
> 
> It does not contain it; it a copy in the same directory that has never changed.

hm, but i have no clue what this "mtx:..." does

>> Maybe 'arguments' lives in some namespace?
>>
>> \directlua {for k, v in pairs(_G) do print(k,v) end}
>>
>> This will show you what is in the global namespace, maybe 'arg'?
> 
> If I put this code in right before the \ifdefined\directlua it prints a lot of "nil".

print(k,v) should print two values, key and value

Hans

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                                           Hans Hagen | PRAGMA ADE
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