Am Thu, 27 Jun 2019 16:36:02 +0200 schrieb luigi scarso:

> On Thu, Jun 27, 2019 at 4:16 PM Ulrike Fischer <news3@nililand.de> wrote:
>
>>
>> \documentclass{article}
>> \usepackage{luatexja}
>>
>> \begin{document}
>> abc
>> \end{document}
>>
>> breaks down with luatex 1.11 with an assertion error :
>> https://i.stack.imgur.com/c8Rcj.png
>>
>>
> confirmed under linux <https://mailman.ntg.nl/mailman/listinfo/dev-luatex>
> lualatex: ../../../source/texk/web2c/luatexdir/tex/texmath.c:2623:
> after_math: Assertion `varmem[(0+5+5+5+5+5+5+2+2+2)].hh.v.RH!=null' failed.

After a big debugging I reduced the error to this plain tex example:

$\directlua{}$
\bye

The assertion error appears as soon as one use \directlua inside
math.