\includegraphics not working in Plain TeX after update

Question

I have been using \includegraphics with plain TeX without problems until yesterday, when I updated TeXLive and wrote (minimal)

\input miniltx
\input graphicx.sty
\includegraphics{espec.png}
\bye

The compilation showed

! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...

\Gin@ii ...eys {Gin}{#1}\Gin@esetsize \the \toks@ 
                                                  \endgroup \fi 
l.6 \includegraphics{espec.png}

and stopped.

Welcome to TeX.SX! The fix proposed here might work for you... — Phelype Oleinik, Oct 10 '19 at 14:04
Thanks, Phelype. I use plain.tex, so I do not know how to adapt the solution proposed for Latex — Pedro J. Paúl, Oct 10 '19 at 14:11
The fix is likely to go into the next graphics release, and should cover plain — Joseph Wright, Oct 10 '19 at 16:47

score 6 · Answer 1 · answered Oct 10 '19 at 14:18

This is the same fix proposed here, adapted to Plain. The differences are that \makeatletter becomes \catcode`\@=11, \m@ne becomes -1. Also graphicx.sty expects @ to be catcode 11, so we move the \catcode`\@=12 (\makeatother) after loading it:

\input miniltx
% Start fix
\catcode`\@=11
\def\set@curr@file#1{%
  \begingroup
    \escapechar=-1
    \xdef\@curr@file{\expandafter\string\csname #1\endcsname}%
  \endgroup
}
\def\quote@name#1{"\quote@@name#1\@gobble""}
\def\quote@@name#1"{#1\quote@@name}
\def\unquote@name#1{\quote@@name#1\@gobble"}
% End fix
\input graphicx.sty
\catcode`\@=12
\includegraphics{example-image}
\bye

It works! Wonderful! Thanks a lot – Pedro J. Paúl Oct 10 '19 at 14:21 — Pedro J. Paúl, Oct 10 '19 at 14:21

\includegraphics not working in Plain TeX after update

1 Answers1