[tex-eplain] eplain 3.12 and toc

[Gérald Tenenbaum]

The following file can be typesetted with eplain 3.11 but produces an 
error with eplain 3.12

\input eplain
\newcount\paras\paras=0
\def\tocsectionentry#1#2{{#1\dotfill\hskip3mm #2}\par}%
\def\paraun#1{#1\par}
\def\paraunn#1{\paraun{#1}\writetocentry{section}{#1}}
\paraunn{paragraph}
\end

TeX-log

This is pdfTeX, Version 3.141592653-2.6-1.40.24 (TeX Live 2022) 
(preloaded format=pdftex)
  restricted \write18 enabled.
entering extended mode
(./test-sommaire.tex 
(/usr/local/texlive/2022/texmf-dist/tex/eplain/eplain.tex)
./test-sommaire.tex:6: Undefined control sequence.
\ifinteger #1->\ifcat _\ifnum 9<1\@gobbleminus
#1 _\else A\fi
\writenumberedcontents at cmdname ...ndafter {\temp }
\toks 0 = {\expandafter \n...

\writenumberedcontentsentry ...ts at cmdname {#1}{#2}
\def \temp {#3}\toks 2 = \...
l.6 \paraunn{paragraph}

?
[1{/usr/local/texlive/2022/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] 
)</us
r/local/texlive/2022/texmf-dist/fonts/type1/public/amsfonts/cm/cmr10.pfb>

Regards,

Gérald
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