Am 28.01.2015 um 14:25 schrieb Henri Menke:
if I place \limits after a math atom, i.e. {}, no error is thrown.
luatex should throw "! Limit controls must follow a math operator." as
the pdftex and xetex engines do.
Minimal example:
${}\limits$
\bye
It will typeset using luatex but will throw an error when processed
using pdftex or xetex.
voss@shania:~/tmp> luatex demo
This is LuaTeX, Version beta-0.79.2 (TeX Live 2015/dev) (rev 5084)
restricted \write18 enabled.
(./demo.tex
! Limit controls must follow a math operator.
l.1 ${}\limits
$
Herbert
