[AUCTeX] TeX-next-error problems when using auctex-latexmk

[Ista Zahn]

Hi all,

I'm using auctex-latexmk from
https://github.com/tom-tan/auctex-latexmk. I'm not entirely sure if I
should be reporting this here or there, but decided to try here first.
If you think this is a bug that should be reported to auctex-latexmk
instead please let me know.

When I compile a .tex file that produces errors, calling
TeX-next-error with C-c ` produces a strange and unhelpful result.
Instead of placing the point in the .tex document at the point of the
error, it opens /usr/share/texmf-dist/tex/context/base/supp-pdf.mkii.
It gets the line number correct (i.e., if there is an error on line 6
of the .tex file then point is placed on line 6 of supp-pdf.mkii), but
somehow it gets the wrong file. I've tried to pinpoint the source of
the problem, but all I've come up with is that it only seems to happen
when the graphicx package is used.

Since TeX-next-error works fine when compiling with C-c LaTeX <ret> I
tried to see what happens differently when calling C-c LatexMk <ret>
instead. Diffs are at http://pastebin.com/X8egZ1EG for the *output*
buffers and at http://pastebin.com/r7aubUvk for the log files.

Installing and activating auctex-latexmk is required to reproduce the
problem, but after that it is easy:

1) create a new .tex file with this content

%%% cut here %%%
\documentclass[11pt]{article}
\usepackage{graphicx}

\begin{document}

\WTF

\end{document}

%%% cut here %%%

2) compile with C-c LatexMk <ret>

3) try to navigate errors with C-c `

Best,
Ista