Hyphen in "A-B" vanished in dvi mode

[muzimuzhi]

Compile example below with dvilualatex, the - in A-B was lost in output dvi, with message

Missing character: There is no @ (U+0040) in font nullfont!

The - in A - B stayed.

\documentclass{article}
\tracinglostchars=3
\begin{document}
A-B
A - B
\end{document}

This was originally reported in mgieseki/dvisvgm#255 and then discussed in https://chat.stackexchange.com/transcript/message/64756198#64756198.

[zauguin]

Resolved with a606fab.

[muzimuzhi]

Thanks for your quick fix!

A l3build install followed by compiling with dvilualatex-dev now gives the expected dvi output.