2011/11/15 Philipp Stephani <p.stephani2 at googlemail.com>: > This is caused by the differences in \endlinechar between Plain and > LaTeX. You can trigger the issue using the \endlinechar in math mode. > The following document breaks only with LuaTeX: > > \newlinechar=`q > \scantokens{$q$} > \bye +LuaTeX