[tex-live] LuaLaTeX 2016/02/01 doesn't work

[Joseph Wright]

On 02/02/2016 10:11, Joseph Wright wrote:
> On 02/02/2016 09:59, Hironobu Yamashita wrote:
>> Hello,
>>
>> Today I updated TeX Live 2015 using tlmgr.
>> Soon after that, I found that LuaLaTeX no longer
>> works.
>>
>> MWE is:
>> \documentclass{article}
>> \begin{document}
>> \[
>> F(x)=a+b+c
>> \]
>> \end{document}
>> and compiling with lualatex (beta-0.80.0) with format
>> LaTeX2e <2016/02/01>, all the math symbols (such as
>> `=' and `+') are broken.
>>
>> After I recovered LaTeX2e <2015/10/01> patch level 2
>> and regenerated lualatex.fmt, everything seems to be ok.
>> The release of LaTeX2e <2016/02/01> for supporting
>> LuaTeX beta-0.87.0 can be too fast...
> 
> Thanks for the report. I'll take a look at this: I have some idea where
> it might be. (I suspect it's nothing to do with supporting v0.87, but of
> course can't be sure until I've fully check.)
> 
> (BTW, not a TeX Live issue: I'll forward to the rest of the team.)
> 
> Joseph

Issue identified: it's not in latex.ltx but rather in a support file.
There's a conceptual question to consider but that needs some time: for
the present I will alter the relevant support file to maintain the older
behaviour.

Joseph