[luatex] What's wrong with LuaTeX v0.95.0?

[Vafa Khalighi]

Hi Joseph

Thanks for taking your time to look at this. I can see now that what I need
to fix but still I would say that LuaTeX breaks TeX's backward
compatibility.

On Sun, May 15, 2016 at 6:02 PM, Joseph Wright <
joseph.wright at morningstar2.co.uk> wrote:

> On 15/05/2016 08:37, Vafa Khalighi wrote:
> > Hi
> >
> > I have been a lollipop user (http://ctan.org/pkg/lollipop) since 15
> years
> > ago and its developer from April 2014. For the past 15 years, I have only
> > been using Knuth's TeX engine since that gives me all I want. If you try
> to
> > build the lollipop format for Knuth's TeX by:
> >
> > tex -ini   -jobname=lollipop -progname=lollipop lollipop.ini
> >
> >
> > and process the following minimal example with lollipop format:
> >
> >
> > \Start
> >
> > Let's say $x$ is a variable
> >
> > \Stop
> >
> > You see no problem in the output. However, if you build the format by
> > using luatex v0.95.0 by
> >
> >
> > luatex -ini   -jobname=lollipop -progname=lollipop lollipop.ini
> >
> >
> > and process the same file, then the x in the inline math mode
> > disappears. Should not luatex at least behave like Knuth's TeX engine?
> > Does anyone know what is wrong here?
> >
> > The content of my lollipop.ini is
> >
> > \scrollmode
> > \input lollipop
> > \dump
> > \endinput
> >
> >
> > Vafa
> >
>
> There've been some changes in the internals of handling \Umathcode,
> which at least in LaTeX terms requires some updates to parts of the
> codebase. What I notice here is that the \Umathcode for 'x' is certainly
> wrong, and doing
>
> % Set up extra primitives
> \ifx\directlua\undefined\else
>   \directlua{tex.enableprimitives("",tex.extraprimitives())}%
> \fi
> % Direct PDF output for convenience
> \ifx\pdfouput\undefined
>   \outputmode=1 %
> \else
>   \pdfoutput=1 %
> \fi
>
> \Start
>
> \Umathcodenum`x=31457400 %
>
> %\showtokens\expandafter{\the\Umathcode`\x }%
> Let's say $x$ is a variable
>
> \Stop
>
> works.
>
> Joseph
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tug.org/pipermail/luatex/attachments/20160515/edb66656/attachment-0001.html>