bug#72999: 29.4; fill-paragraph error in latex mode

bug#72999: 29.4; fill-paragraph error in latex mode

[Vadim Zaliva]

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--text follows this line--

If I have buffer like this:

Foo \cite{bar} bar.

And press `M-q` I get error:

LaTeX-indent-calculate-last: Wrong type argument: stringp, nil



In GNU Emacs 29.4 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20,
  cairo version 1.16.0) of 2024-06-23 built on lcy02-amd64-050
Repository revision: 176061eb965cf945e7627ce87bb16ec5a03f8a4d
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101007
System Description: Ubuntu 23.10

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-- 
"La perfection est atteinte non quand il ne reste rien a ajouter, mais quand il ne reste rien a enlever."  (Antoine de Saint-Exupery)

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bug#72999: 29.4; fill-paragraph error in latex mode

[Arash Esbati]

Vadim Zaliva <lord@crocodile.org> writes:

> If I have buffer like this:
>
> Foo \cite{bar} bar.
>
> And press `M-q` I get error:
>
> LaTeX-indent-calculate-last: Wrong type argument: stringp, nil
> [...]
> Major mode: LaTeX

It seems you're running AUCTeX as major-mode and not the builtin one.
Which version of AUCTeX are you using and how did you install it?

At any rate, I can't reproduce what you describe with this small file:

--8<---------------cut here---------------start------------->8---
\documentclass{article}

\begin{document}

Foo \cite{bar} bar.! Point here hitting M-q

\end{document}

%%% Local Variables:
%%% mode: LaTeX
%%% TeX-master: t
%%% End:
--8<---------------cut here---------------end--------------->8---

Can you come up with a recipe to reproduce with:

• Start Emacs with 'emacs -Q'
• Activate AUCTeX by eval'ing this in scratch (presuming you've
  installed AUCTeX from ELPA):
    (progn
      (setq debug-on-error t)
      (package-initialize t)
      (package-activate 'auctex))
• In the file above (or any other example), tell us exactly where to put
  the cursor before hitting 'M-q'
• Show what the debugger says in your case.

Best, Arash

bug#72999: 29.4; fill-paragraph error in latex mode

[Eli Zaretskii]

> Date: Tue, 3 Sep 2024 08:46:10 +0200
> From: Vadim Zaliva <lord@crocodile.org>
> 
> If I have buffer like this:
> 
> Foo \cite{bar} bar.
> 
> And press `M-q` I get error:
> 
> LaTeX-indent-calculate-last: Wrong type argument: stringp, nil

I cannot reproduce this in "emacs -Q", and I see no function named
LaTeX-indent-calculate-last anywhere in Emacs.  I suspect this comes
from some add-on package you have installed.

bug#72999: 29.4; fill-paragraph error in latex mode

[Vadim Zaliva]

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Arash, thanks for response. I do have auctex 14.0.6 installed via ELPA. 
I tried to reproce the problem starting from `emacs -Q` and it did not 
reproduce. With my default setup it's still happening with the following 
debug trace:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
   LaTeX-indent-level-count()
   LaTeX-indent-calculate-last(outer)
   LaTeX-indent-calculate(outer)
   LaTeX-indent-line()
   indent-according-to-mode()
   LaTeX-fill-region-as-para-do(3960 #<marker at 4117 in paper.tex> nil)
   LaTeX-fill-region-as-paragraph(3960 4117 nil)
   LaTeX-fill-paragraph(nil)
   fill-paragraph(nil t)
   funcall-interactively(fill-paragraph nil t)
   command-execute(fill-paragraph)

LaTeX-indent-level-count is defined `latex.el` from acutex package. Any 
thoughts what could be causing it and what I can try to diagnose it further?

Thanks!

Vadim


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bug#72999: 29.4; fill-paragraph error in latex mode

[Arash Esbati]

Vadim Zaliva <lord@crocodile.org> writes:

> Arash, thanks for response. I do have auctex 14.0.6 installed via
> ELPA. I tried to reproce the problem starting from `emacs -Q` and it
> did not reproduce.

You're welcome.  The above essentially says that AUCTeX isn't the
culprit per se since it works with the standard setup.

> With my default setup it's still happening with the following debug
> trace:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   LaTeX-indent-level-count()
>   LaTeX-indent-calculate-last(outer)
>   LaTeX-indent-calculate(outer)
>   LaTeX-indent-line()
>   indent-according-to-mode()
>   LaTeX-fill-region-as-para-do(3960 #<marker at 4117 in paper.tex> nil)
>   LaTeX-fill-region-as-paragraph(3960 4117 nil)
>   LaTeX-fill-paragraph(nil)
>   fill-paragraph(nil t)
>   funcall-interactively(fill-paragraph nil t)
>   command-execute(fill-paragraph)
>
> LaTeX-indent-level-count is defined `latex.el` from acutex
> package. Any thoughts what could be causing it and what I can try to
> diagnose it further?

Thanks for the debug info, I have no idea why this happens in your
setup, so you have to dig further.  Some general ideas are:

• With your setup and your .tex file opened, do 'M-x
  list-load-path-shadows RET' and see if you have a stale AUCTeX
  installation on your HD; maybe you search also your HD yourself
• With your setup, load your .tex file, instrument[1] the function
  `LaTeX-indent-level-count' and trigger the issue.  Watch the function
  running[2] and where it chokes, maybe that helps
• Bisect your packages you load with AUCTeX and see which one breaks
  with your .tex file
• Just be on the safe side, uninstall AUCTeX via package manager
  interface, restart Emacs, and install AUCTeX again via the package
  manager interface.

HTH.  Best, Arash

Footnotes:
[1]  https://www.gnu.org/software/emacs/manual/html_node/elisp/Instrumenting.html
[2]  https://www.gnu.org/software/emacs/manual/html_node/elisp/Edebug-Execution-Modes.html

bug#72999: 29.4; fill-paragraph error in latex mode

[Vadim Zaliva]

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Removing the following from my .emacs fixed the problem:


(use-package latex-extra

   :ensure t

   :hook (LaTeX-mode . latex-extra-mode))


-- 
"La perfection est atteinte non quand il ne reste rien a ajouter, mais quand il ne reste rien a enlever."  (Antoine de Saint-Exupery)

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bug#72999: 29.4; fill-paragraph error in latex mode

[Arash Esbati]

tags 72999 notabug
close 72999
thanks

Vadim Zaliva <lord@crocodile.org> writes:

> Removing the following from my .emacs fixed the problem:
>
> (use-package latex-extra
>   :ensure t
>   :hook (LaTeX-mode . latex-extra-mode))

Thanks for reporting back.  Maybe you want to report the issue to
latex-extra tracker[1].

I'm closing this report here since it's not an AUCTeX bug.

Best, Arash

Footnotes:
[1]  https://github.com/Malabarba/latex-extra/issues