On Tue, Nov 14, 2017 at 2:22 PM, David Carlisle <d.p.carli...@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 > \showboxbreadth100 > \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
