Subject: bug#40778: 12.2.0; Previewing floats with H option with float and caption package

From: Anatole Dahan <[email-masked]>
Date: Wed, 22 Apr 2020 19:37:44 +0200

Hello,

I have been experiencing issues with preview, together with caption.sty and float.sty.

You will find a minimal example that triggers the errors documented below, while 
compiling without errors outside of preview. If you
remove the package caption.sty, or the package float.sty, preview
works.

If you change the H option on figures to !h, preview works again ; however, in my actual
work, where I discovered these errors, even after swapping all [H] to [!h], I still get the
"Extra }, or forgotten \endgroup." error. I don’t know if this is a usual behaviour of preview
(as I guess cutting a tex doc in chunks can be tricky)
if not, please let me know and I will try to build a minimal example.

Best,
-Anatole

Emacs  : GNU Emacs 26.3 (build 1, x86_64-apple-darwin18.2.0, NS appkit-1671.20 Version 10.14.3 (Build 18D109))
 of 2019-09-02
Package: 12.2.0

Run buffer contents:

Running `Preview-LaTeX' on `bug_minimal' with ``pdflatex  -interaction=nonstopmode -file-line-error \&prv_bug_minimal "/AUCTEXINPUT{" bug_minimal.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 <2020-04-06>
CUSTOMISED FORMAT. Preloaded files:
        .
 article.cls    2019/12/20 v1.4l Standard LaTeX document class
  size10.clo    2019/12/20 v1.4l Standard LaTeX file (size option)
   float.sty    2001/11/08 v1.3d Float enhancements (AL)
 caption.sty    2020/01/03 v3.4h Customizing captions (AR)
caption3.sty    2020/01/03 v1.8h caption3 kernel (AR)
  keyval.sty    2014/10/28 v1.15 key=value parser (DPC)
        .
(./bug_minimal.tex (/usr/local/texlive/2020/texmf-dist/tex/latex/l3backend/l3backend-pdfmode.def)
No file bug_minimal.aux.
(/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex/preview.sty (/usr/local/texlive/2020/texmf-dist/tex/generic/luatex85/luatex85.sty) (/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex/prtightpage.def) (/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex/prauctex.def
No auxiliary output files.

(/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex/prauctex.cfg)) (/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex/prfootnotes.def)
Preview: Fontsize 10pt
Preview: PDFoutput 1
)
./bug_minimal.tex:13: Preview: Snippet 1 started.
<-><->
      
l.13 \begin{figure}
                   [H]
./bug_minimal.tex:15: Extra }, or forgotten \endgroup.
\@endfloatbox ...pagefalse \outer@nobreak \egroup 
                                                  \color@endbox 
l.15 \end{figure}
                 
Preview: Tightpage -32891 -32891 32891 32891
./bug_minimal.tex:15: Preview: Snippet 1 ended.(582542+0x22609920).
<-><->
      
l.15 \end{figure}
                 
[1{/usr/local/texlive/2020/texmf-var/fonts/map/pdftex/updmap/pdftex.map}]

./bug_minimal.tex:17: LaTeX Error: Not in outer par mode.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.17 \begin{figure}[!h]
                       
./bug_minimal.tex:19: Extra }, or forgotten \endgroup.
\@endfloatbox ...pagefalse \outer@nobreak \egroup 
                                                  \color@endbox 
l.19 \end{figure}
                 
./bug_minimal.tex:19: Preview: Snippet 2 ended.(582542+0x22609920).
<-><->
      
l.19 \end{figure}
                 
[2]

./bug_minimal.tex:25: LaTeX Error: \begin{figure} on input line 17 ended by \end{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.25 \end{document}
                   
./bug_minimal.tex:25: You can't use `\end' in internal vertical mode.
\enddocument ... \endgroup \deadcycles \z@ \@@end 
                                                  
l.25 \end{document}

./bug_minimal.tex:25: LaTeX Error: \begin{figure} on input line 17 ended by \end{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.25 \end{document}
                   
./bug_minimal.tex:25: Missing } inserted.
<inserted text> 
                }
l.25 \end{document}
                   
)
! Emergency stop.
<*> ...bug_minimal /AUCTEXINPUT{ bug_minimal.tex }
                                                  
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on bug_minimal.log.

TeX Output exited as expected with code 1 at Wed Apr 22 19:09:38
Running `Preview-PDF2DSC' with ``pdf2dsc bug_minimal.pdf bug_minimal.prv/tmpQ9HTte/preview.dsc''
Parser: End of Preview snippet 2 unexpected
Error: /undefinedfilename in --file--
Operand stack:
   PDFfile   (bug_minimal.pdf)   (r)
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1974   1   3   %oparray_pop   1973   1   3   %oparray_pop   1961   1   3   %oparray_pop   1817   1   3   %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--
Dictionary stack:
   --dict:742/1123(ro)(G)--   --dict:0/20(G)--   --dict:75/200(L)--
Current allocation mode is local
Last OS error: No such file or directory
Current file position is 1814
GPL Ghostscript 9.52: Unrecoverable error, exit code 1

Preview-PDF2DSC exited abnormally with code 1 at Wed Apr 22 19:09:38
PDF2DSC sentinel: Opening input file: No such file or directory, /Users/anatole/Documents/TestEmacs/bug_minimal.prv/tmpQ9HTte/preview.dsc

current state:
==============
(setq
 AUCTeX-version "12.2.0"
 LaTeX-command-style '(("" "%(PDF)%(latex) %(file-line-error) %(extraopts) %S%(PDFout)"))
 image-types '(png gif tiff jpeg xpm xbm pbm)
 preview-image-type 'png
 preview-image-creators '((dvipng (open preview-gs-open preview-dvipng-process-setup)
                           (place preview-gs-place) (close preview-dvipng-close))
                          (png (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          (jpeg (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          (pnm (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          (tiff (open preview-gs-open) (place preview-gs-place)
                           (close preview-gs-close))
                          )
 preview-dvipng-image-type 'png
 preview-dvipng-command "dvipng -picky -noghostscript %d -o %m/prev%%03d.png"
 preview-pdf2dsc-command "pdf2dsc %s.pdf %m/preview.dsc"
 preview-gs-command "/Library/TeX/texbin/rungs"
 preview-gs-options '("-q" "-dDELAYSAFER" "-dNOPAUSE" "-DNOPLATFONTS" "-dPrinted"
                      "-dTextAlphaBits=4" "-dGraphicsAlphaBits=4")
 preview-gs-image-type-alist '((png png "-sDEVICE=png16m") (dvipng png "-sDEVICE=png16m")
                               (jpeg jpeg "-sDEVICE=jpeg") (pnm pbm "-sDEVICE=pnmraw")
                               (tiff tiff "-sDEVICE=tiff12nc"))
 preview-fast-conversion t
 preview-prefer-TeX-bb nil
 preview-dvips-command "dvips -Pwww -i -E %d -o %m/preview.000"
 preview-fast-dvips-command "dvips -Pwww %d -o %m/preview.ps"
 preview-scale-function 'preview-scale-from-face
 preview-LaTeX-command '("%`%l \"\\nonstopmode\\nofiles\\PassOptionsToPackage{"
                         ("," . preview-required-option-list)
                         "}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined"
                         preview-default-preamble "\\fi}\"%' \"\\detokenize{\" %t \"}\"")
 preview-required-option-list '("active" "tightpage" "auctex"
                                (preview-preserve-counters "counters"))
 preview-preserve-counters nil
 preview-default-option-list '("displaymath" "floats" "graphics" "textmath" "sections"
                               "footnotes")
 preview-default-preamble '("\\RequirePackage[" ("," . preview-default-option-list)
                            "]{preview}[2004/11/05]" "\\PreviewEnvironment{prooftree}"
                            "\\PreviewEnvironment{center}")
 preview-LaTeX-command-replacements nil
 preview-dump-replacements '(preview-LaTeX-command-replacements
                             ("\\`\\([^ ]+\\)\\(?: +\\(?:\\(--?kanji[= ][^ ]+\\)\\|-\\(?:[^ \\\"]\\|\\\\.\\|\"[^\"]*\"\\)*\\)\\)*\\(.*\\)\\'" "\\1 -ini \\2 -interaction=nonstopmode \"&\\1\" " preview-format-name ".ini \\3")
                             )
 preview-undump-replacements '(("\\`\\([^ ]+\\)\\(?: +\\(?:\\(--?kanji[= ][^ ]+\\)\\|-\\(?:[^ \\\"]\\|\\\\.\\|\"[^\"]*\"\\)*\\)\\)*.* \"\\\\input\" \"\\\\detokenize{\" \\(.*\\) \"}\"\\'" "\\1 \\2 -interaction=nonstopmode -file-line-error " preview-format-name " \"/AUCTEXINPUT{\" \\3 \"}\"")
                               )
 preview-auto-cache-preamble 'ask
 preview-TeX-style-dir "/Users/anatole/.emacs.d/elpa/auctex-12.2.0/latex"
 )

Output from running `/Library/TeX/texbin/rungs -h':
GPL Ghostscript 9.52 (2020-03-19)
Copyright (C) 2020 Artifex Software, Inc.  All rights reserved.
Usage: gs [switches] [file1.ps file2.ps ...]
Most frequently used switches: (you can use # in place of =)
 -dNOPAUSE           no pause after page   | -q       `quiet', fewer messages
 -g<width>x<height>  page size in pixels   | -r<res>  pixels/inch resolution
 -sDEVICE=<devname>  select device         | -dBATCH  exit after last file
 -sOutputFile=<file> select output file: - for stdout, |command for pipe,
                                         embed %d or %ld for page #
Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PostScriptLevel3 PDF
Default output device: bbox
Available devices:
   alc1900 alc2000 alc4000 alc4100 alc8500 alc8600 alc9100 ap3250 appledmp
   atx23 atx24 atx38 bbox bit bitcmyk bitrgb bitrgbtags bj10e bj10v bj10vh
   bj200 bjc600 bjc800 bjc880j bjccmyk bjccolor bjcgray bjcmono bmp16 bmp16m
   bmp256 bmp32b bmpgray bmpmono bmpsep1 bmpsep8 ccr cdeskjet cdj1600 cdj500
   cdj550 cdj670 cdj850 cdj880 cdj890 cdj970 cdjcolor cdjmono cdnj500 cfax
   chp2200 cif cljet5 cljet5c cljet5pr coslw2p coslwxl declj250 deskjet
   devicen dfaxhigh dfaxlow display dj505j djet500 djet500c dl2100 dnj650c
   epl2050 epl2050p epl2120 epl2500 epl2750 epl5800 epl5900 epl6100 epl6200
   eplcolor eplmono eps2write eps9high eps9mid epson epsonc escp escpage
   faxg3 faxg32d faxg4 fmlbp fmpr fpng fs600 gdi hl1240 hl1250 hl7x0
   hpdj1120c hpdj310 hpdj320 hpdj340 hpdj400 hpdj500 hpdj500c hpdj510
   hpdj520 hpdj540 hpdj550c hpdj560c hpdj600 hpdj660c hpdj670c hpdj680c
   hpdj690c hpdj850c hpdj855c hpdj870c hpdj890c hpdjplus hpdjportable ibmpro
   ijs imagen inferno ink_cov inkcov itk24i itk38 iwhi iwlo iwlq jetp3852
   jj100 jpeg jpegcmyk jpeggray la50 la70 la75 la75plus laserjet lbp310
   lbp320 lbp8 lex2050 lex3200 lex5700 lex7000 lips2p lips3 lips4 lips4v
   lj250 lj3100sw lj4dith lj4dithp lj5gray lj5mono ljet2p ljet3 ljet3d ljet4
   ljet4d ljet4pjl ljetplus ln03 lp1800 lp1900 lp2000 lp2200 lp2400 lp2500
   lp2563 lp3000c lp7500 lp7700 lp7900 lp8000 lp8000c lp8100 lp8200c lp8300c
   lp8300f lp8400f lp8500c lp8600 lp8600f lp8700 lp8800c lp8900 lp9000b
   lp9000c lp9100 lp9200b lp9200c lp9300 lp9400 lp9500c lp9600 lp9600s
   lp9800c lps4500 lps6500 lq850 lxm3200 lxm5700m m8510 md1xMono md2k
   md50Eco md50Mono md5k mgr4 mgr8 mgrgray2 mgrgray4 mgrgray8 mgrmono miff24
   mj500c mj6000c mj700v2c mj8000c ml600 necp6 npdl nullpage oce9050 oki182
   oki4w okiibm oprp opvp paintjet pam pamcmyk32 pamcmyk4 pbm pbmraw pcl3
   pclm pcx16 pcx24b pcx256 pcxcmyk pcxgray pcxmono pdfimage24 pdfimage32
   pdfimage8 pdfwrite pgm pgmraw pgnm pgnmraw photoex picty180 pj pjetxl
   pjxl pjxl300 pkm pkmraw pksm pksmraw plan plan9bm planc plang plank planm
   plib plibc plibg plibk plibm png16 png16m png256 png48 pngalpha pnggray
   pngmono pngmonod pnm pnmraw ppm ppmraw pr1000 pr1000_4 pr150 pr201
   ps2write psdcmyk psdcmyk16 psdcmykog psdrgb psdrgb16 pxlcolor pxlmono
   r4081 rinkj rpdl samsunggdi sj48 spotcmyk st800 stcolor t4693d2 t4693d4
   t4693d8 tek4696 tiff12nc tiff24nc tiff32nc tiff48nc tiff64nc tiffcrle
   tiffg3 tiffg32d tiffg4 tiffgray tifflzw tiffpack tiffscaled tiffscaled24
   tiffscaled32 tiffscaled4 tiffscaled8 tiffsep tiffsep1 txtwrite uniprint
   xcf xes xpswrite
Search path:
   /usr/local/Cellar/ghostscript/9.52/share/ghostscript/9.52/Resource/Init :
   /usr/local/Cellar/ghostscript/9.52/share/ghostscript/9.52/lib :
   /usr/local/Cellar/ghostscript/9.52/share/ghostscript/9.52/Resource/Font :
   /usr/local/Cellar/ghostscript/9.52/share/ghostscript/fonts :
   /usr/local/Cellar/ghostscript/9.52/share/fonts/default/ghostscript :
   /usr/local/Cellar/ghostscript/9.52/share/fonts/default/Type1 :
   /usr/local/Cellar/ghostscript/9.52/share/fonts/default/TrueType :
   /usr/lib/DPS/outline/base : /usr/openwin/lib/X11/fonts/Type1 :
   /usr/openwin/lib/X11/fonts/TrueType
For more information, see /usr/local/Cellar/ghostscript/9.52/share/doc/ghostscript/9.52/Use.htm.
Please report bugs to bugs.ghostscript.com.