LuaLaTeX と jlreq の環境で,全角スペースから始まるverbatim環境でエラーになりました.upLaTeX ではエラーにならないようなので念のため,報告します.
% cat tmp.tex
\documentclass[a4paper]{jlreq}
\begin{document}\begin{verbatim}
全角スペースから始まるverbatim環境でエラー.
\end{verbatim}
\end{document}
% lualatex ~/tmp
(中略)
(中略)
ABD: EverySelectfont initializing macros
! Missing number, treated as zero.
<to be read again>
\ltj@reset@globaldefs
l.7 \end{verbatim}
?
! Missing number, treated as zero.
<to be read again>
\ltj@reset@globaldefs
l.7 \end{verbatim}
?
% lualatex --version
This is LuaHBTeX, Version 1.12.0 (TeX Live 2020)
Execute 'luahbtex --credits' for credits and version details.
There is NO warranty. Redistribution of this software is covered by
the terms of the GNU General Public License, version 2 or (at your option)
any later version. For more information about these matters, see the file
named COPYING and the LuaTeX source.
LuaTeX is Copyright 2020 Taco Hoekwater and the LuaTeX Team.
This is LuaHBTeX, Version 1.12.0 (TeX Live 2020)
Execute 'luahbtex --credits' for credits and version details.
There is NO warranty. Redistribution of this software is covered by
the terms of the GNU General Public License, version 2 or (at your option)
any later version. For more information about these matters, see the file
named COPYING and the LuaTeX source.
LuaTeX is Copyright 2020 Taco Hoekwater and the LuaTeX Team.