# [luatex] How to get a \mid binary relation that grows in LuaTeX

luigi scarso luigi.scarso at gmail.com
Wed Nov 15 14:25:51 CET 2017

On Tue, Nov 14, 2017 at 2:22 PM, David Carlisle <d.p.carlisle at gmail.com> wrote:
> The same as plain tex to cut down the dependencies:-)
>
>
> % https://tex.stackexchange.com/questions/401234/how-to-get-a-mid-binary-relation-that-grows-in-luatex
>
> \tracingonline1
> \scrollmode
> \thickmuskip=10mu
>
> $\left(a\mathrel{}\middle|\mathrel{}b\right)\showlists$\showlists
>
> \bye
>
>
> the math lists are similar in pdftex and luatex but the box output has
> an extra empty box and an extra \thickuskip skip
Thank you for the report, we are seeing the issue.

--
luigi