I receive an assertion when trying to compile the following example with 
lualatex:

----------------------------------
\documentclass{book}
\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{FreeSerif}
\setsansfont[Ligatures=TeX]{FreeSans}
\setmonofont{FreeMono}
\usepackage{polyglossia}
\setdefaultlanguage{hebrew}
\setotherlanguage{english}
\begin{document}
ל- ו-\textquotedbl\textenglish[variant=american]{Page~1}“,
\end{document}
----------------------------------

The assertion is the following:

(/usr/local/texlive/2020/texmf-dist/tex/latex/base/ts1cmr.fd)lualatex: 
../../../texk/web2c/luatexdir/lang/texlang.c:986: hnj_hyphenation: Assertion 
`(((varmem[(wordstart)].hh.u.B1) & (1 << 0)) && !((varmem[(wordstart)].hh.u.B1) 
& (1 << 1) ) && !((varmem[(wordstart)].hh.u.B1) & (1 << 2) ))' failed.

I also get the assertion if I try with lualatex-dev. I'm on an updated TeX Live 
2020 on Ubuntu 20.10.

Can others reproduce?

Scott

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