Bug#997024: [greek]babel + cleveref + pagenumbering + label = ☇

["Peter Mueller" <petermueller@ro.ru>]

Package: texlive-latex-extra

Version: 2021.20210921-1

Reproduce:

1) Put

\documentclass{article}
\usepackage[greek]{babel}%%% greek should not necessarily be the main language; e.g., [greek, ngerman] would also expose the bug
\usepackage{cleveref}
\begin{document}
\pagenumbering{Roman}
\label{someLabel}
\end{document}

into mwe.tex

2) Run pdflatex mwe

3) Observe the error message

! Incomplete \iffalse; all text was ignored after line 6.
<inserted text>
\fi
<*> mwe

? X

Since cleveref has not been updated since 2018, I wildly guess that it is cleveref that has to be updated to match the current development of latex and babel.  At the same time, I'm unsure who is the real culprit (perhaps, none, but the interface is broken) and leave the investigation concerning bugs in packaging or upstream development to the Debian maintainers.

Thanks in advance

Peter