[luatex] luatex and minted

[Robert Alessi]

Dear all,

I have no idea why the following all of a sudden fails to compile with
lualatex (I run an up-to-date texlive 2020):

--------------------snip--------------------
\documentclass{article}

\usepackage{minted}

\begin{document}

\begin{minted}{latex}
   a-'
\end{minted}

\end{document}
--------------------snip--------------------

Remarks:
--------

1. The error message I get:
(./_minted-test/C1B3C74AA35F87A14838FF588F40D6B6715769D21B52E45A
A7CE8C545C6279BA.pygtexlualatex: ../../../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.

2. If I remove the straight single quotation mark so as to write a-
   instead of a-' it passes.

3. xelatex and pdflatex work on this file.

4. I tried lualatex-dev --shell-escape but no avail.

Any ideas would be much appreciated!

Best,

Robert