#56 \pdfsavepos, etc ... incompatible with pdfTeX

[Florian]

XeTeX obviously handles \pdfsavepos, \pdflastxpos, \pdflastypos differently than pdfTeX.
Markus Kohm has kindly prepared this minimal example

\documentclass{article}
\hoffset=5in
\voffset=5in
\begin{document}
\makeatletter
\noindent\mbox{}\pdfsavepos\protected@write\@auxout{}{%
\@percentchar\space \string\pdflastxpos, \string\pdflastypos:
\noexpand\number\pdflastxpos,
\noexpand\number\pdflastypos^^J%
\@percentchar\space This should be 32480951, 22834503
}
\end{document}

where XeTeX writes different values.

This behaviour breaks e.g. \marginnote in connection with the crop-package:

\documentclass[a6paper]{scrbook}

\usepackage[frame,center,a4]{crop}
\usepackage{marginnote}

\begin{document}

Quisque \marginnote{mnote}facilisis erat a dui.
Suspendisse \marginpar{mpar} sagittis ante a urna.

\end{document}

This compiles correctly with pdfLaTeX, but with wrong positioning with XeLaTeX.

Cf. also:
http://www.komascript.de/node/1486

[Anonymous]

This bug has been fixed by http://www.tug.org/svn/texlive?view=revision&revision=53855, and will be included in TeX Live 2020.

[Just A. Man]

I can confirm that the example

\documentclass[a6paper]{scrbook}
\usepackage[frame,center,a4]{crop}
\usepackage{marginnote}
\begin{document}
Quisque \marginnote{mnote}facilisis erat a dui.
Suspendisse \marginpar{mpar} sagittis ante a urna.
\end{document}

compiled with pdflatex or lualatex yields an visually pleasant output, whereas xelatex yields a visually unpleasant output as of TeX Live 2019/Debian on Ubuntu. As for TL2020, I know nothing yet.

[Anonymous]

This plaintex example shows that the \pdflastypos is still wrong:

\ifdefined\directlua
  \let\pdfsavepos  \savepos
  \let\pdflastxpos \lastxpos
  \let\pdflastypos \lastypos
\fi

\pdfsavepos
\write-1{saved pos: \the\pdflastxpos, \the\pdflastypos}
% both pdftex and luatex give 50644704 for \pdflastypos,
% but xetex gives 48462072, which is 2182632 (about 33.3pt) smaller
content
\bye

[Just A. Man]

Output with XeTeX, Version 3.141592653-2.6-0.999994 (TeX Live 2022/Debian) still bad.