[luatex] luatexbase and expl3

[Hironori KITAGAWA]

Hello,

I found that the following source

\documentclass{minimal}
\usepackage{luatexbase}% 2015/10/04 v1.3 
\usepackage{expl3}%      2015/09/27 v6111
\ExplSyntaxOn
\xetex_suppressfontnotfounderror:D 0
\ExplSyntaxOff
\begin{document}
\end{document}

causes the following error:

! Undefined control sequence.
l.5 \xetex_suppressfontnotfounderror:D
                                     0
? x


Regards
Hironori KITAGAWA <h_kitagawa2001 at yahoo.co.jp>