[tex-live] lualatex raises weird error

[Uwe Siart]

After today's update lualatex stopped working for me, because it raises
a weird error about fonts. This MWE

\documentclass{article}
\usepackage{unicode-math}
\setmainfont{Libertinus Serif}
\setsansfont{Libertinus Sans}
\setmathfont{Libertinus Math}
\begin{document}
Test
\end{document}

gives me

Runaway argument?
76543210\q_stop newline  	^^O^^W^^_^^W^^R^^A^^Pnewline  This font family consists o\ETC.
! File ended while scanning use of \__iow_wrap_end_chunk:w.
<inserted text> 
\par 
<*> \input test.tex
                
! Emergency stop.
<*> \input test.tex
                
 388 words of node memory still in use:
   2 hlist, 1 rule, 1 dir, 3 kern, 1 glyph, 4 attribute, 50 glue_spec, 4 attribute_list, 1 write nodes
   avail lists: 1:1,2:9,3:3,4:1,5:7,7:2,8:1,9:2
!  ==> Fatal error occurred, no output PDF file produced!


-- 
Uwe