bug#62445: 13.1.10; bug in preview-region applied to repeated math environments

[Paul Nelson]

Thanks for your response.  Here is my complete *_region_ output* for the example I described.  -file-line-error already seems to be included.  Please let me know if I missed something.

Running `Preview-LaTeX' on `~/doit/_region_' with ``pdflatex  -file-line-error   --synctex=1 "\nonstopmode\nofiles\PassOptionsToPackage{active,tightpage,auctex}{preview}\AtBeginDocument{\ifx\ifPreview\undefined\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes,showlabels]{preview}[2004/11/05]\fi}" "\input" "\detokenize{" _region_.tex "}"''
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-03-06>
No auxiliary output files.

(./_region_.tex  !name(test.tex) (/usr/local/texlive/2020/texmf-dist/tex/latex/amscls/amsart.cls
Document Class: amsart 2017/10/31 v2.20.4
(/usr/local/texlive/2020/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/local/texlive/2020/texmf-dist/tex/latex/amsmath/amstext.sty (/usr/local/texlive/2020/texmf-dist/tex/latex/amsmath/amsgen.sty)) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsmath/amsbsy.sty) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsmath/amsopn.sty)) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsfonts/umsa.fd) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsfonts/amsfonts.sty)) (/usr/local/texlive/2020/texmf-dist/tex/latex/l3backend/l3backend-pdfmode.def)
No file _region_.aux.
(/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/preview.sty (/usr/local/texlive/2020/texmf-dist/tex/generic/luatex85/luatex85.sty) (/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/prtightpage.def) (/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/prauctex.def
No auxiliary output files.


(/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/prauctex.cfg)) (/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/prfootnotes.def) (/Users/paulnelson/.emacs.d/elpa/auctex-13.1.10/latex/prshowlabels.def)
Preview: Fontsize 10pt
Preview: PDFoutput 1
) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsfonts/umsa.fd) (/usr/local/texlive/2020/texmf-dist/tex/latex/amsfonts/umsb.fd)  !name(test.tex) !offset(-2)
./_region_.tex:5: Preview: Snippet 1 started.
<-><->
     
l.5 $
     x$
Preview: Tightpage -32891 -32891 32891 32891
./_region_.tex:5: Preview: Snippet 1 ended.(282168+0x374556).
<-><->
     
l.5 $x$
       
[1{/usr/local/texlive/2020/texmf-var/fonts/map/pdftex/updmap/pdftex.map}]  !name(test.tex) !offset(-4)
\newlabel{tocindent-1}{0pt}
\newlabel{tocindent0}{0pt}
\newlabel{tocindent1}{0pt}
\newlabel{tocindent2}{0pt}
\newlabel{tocindent3}{0pt}
 )
(see the transcript file for additional information)</usr/local/texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm/cmmi10.pfb>
Output written on _region_.pdf (1 page, 8292 bytes).
SyncTeX written on _region_.synctex.gz.
Transcript written on _region_.log.

TeX Output exited as expected with code 1 at Sat Mar 25 17:42:58
Running `Preview-PDF2DSC' with ``pdf2dsc _region_.pdf _region_.prv/tmpAnnFJy/preview.dsc''

Preview-PDF2DSC finished at Sat Mar 25 17:42:58
Running `Preview-Ghostscript' with ``/usr/local/bin/gs -sOutputFile\=_region_.prv/tmpAnnFJy/pr1-\%d.pbm -q -dNOPAUSE -dNOSAFER -DNOPLATFONTS -dPrinted -dTextAlphaBits\=4 -dGraphicsAlphaBits\=4 -sDEVICE\=pnmraw -r238.169x239.282''

Preview-Ghostscript finished at Sat Mar 25 17:42:58

On Sat, Mar 25, 2023 at 5:41 PM David Kastrup <dak@gnu.org> wrote:

Paul Nelson <ultrono@gmail.com> writes:

> Emacs  : GNU Emacs 29.0.50 (build 3, x86_64-apple-darwin21.6.0, NS
> appkit-2113.60 Version 12.6 (Build 21G115))
>  of 2022-11-06
> Package: 13.1.10
>
> Take the following document:
>
> #+begin_src latex
> \documentclass{amsart}
> \begin{document}
>  $x$ $x$
> \end{document}
> #+end_src
>
>
> Run ~preview-region~ on the region consisting of the first $x$.  This works
> as expected.
>
> Next, run ~preview-region~ on the region consisting of just the second
> $x$.  This does not preview the second $x$.  Instead, it refreshes the
> overlay on the first $x$.
>
> The relevant output:
>
> #+begin_quote
> ./_region_.tex:5: Preview: Snippet 1 started.
> <-><->
>
> l.5 $
>      x$
> Preview: Tightpage -32891 -32891 32891 32891
> ./_region_.tex:5: Preview: Snippet 1 ended.(282168+0x374556).
> <-><->
>
> l.5 $x$
>
> #+end_quote
>
>
> The issue here is that there's not enough context for
> ~preview-parse-messages~ to determine which $x$ to overlay.

I'd just add -file-line-error to the options you are calling TeX with.
That makes for more reliable error message interpretation.

--
David Kastrup