Subject: bug#36310: closed (Re: bug#36310: 12.1.2; TeX-complete-symbol in math mode results in error for unique completion)

From: [email-masked] (GNU bug Tracking System)
Date: Sun, 23 Jun 2019 19:58:02 +0000

Your bug report

#36310: 12.1.2; TeX-complete-symbol in math mode results in error for unique completion

which was filed against the auctex package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
36310: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=36310
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#36310: 12.1.2; TeX-complete-symbol in math mode results in error for unique completion
From: Arash Esbati <[email-masked]>
To: Gustavo Barros <[email-masked]>
Cc: [email-masked]
Date: Sun, 23 Jun 2019 21:45:27 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

Gustavo Barros <[email-masked]> writes:

> The use of 'TeX-complete-symbol' ("C-M-i") in math mode results in
> error when the completion is unique.
> [...]
> Then type:
>
> $$ "C-b" \Right "C-M-i"
>
> The completion is actually executed, but triggers an error, whose 
> backtrace is:
>
> #+begin_verbatim
> Debugger entered--Lisp error: (wrong-type-argument stringp (if 
> TeX-insert-braces "{}"))
> regexp-quote((if TeX-insert-braces "{}"))
> TeX-complete-symbol()
> funcall-interactively(TeX-complete-symbol)
> call-interactively(TeX-complete-symbol nil nil)
> command-execute(TeX-complete-symbol)
> #+end_verbatim

Hi Gustavo,

thanks for your report.  This issue was already reported here[1] and
was resolved with this patch[2].  I hope you can wait for next AUCTeX
release.

Best, Arash

P.S. I suggest you don't use $$ for displayed math with LaTeX.

Footnotes:
[1]  https://lists.gnu.org/archive/html/bug-auctex/2019-04/msg00000.html

[2]  http://git.savannah.gnu.org/cgit/auctex.git/commit/?id=8a36595fb116cd3c6e3f429c9be2101b211c49af

Subject: 12.1.2; TeX-complete-symbol in math mode results in error for unique completion
From: Gustavo Barros <[email-masked]>
To: [email-masked]
Date: Thu, 20 Jun 2019 12:08:58 -0300
List-Id: <debbugs-submit.debbugs.gnu.org>

The use of 'TeX-complete-symbol' ("C-M-i") in math mode results in error 
when
the completion is unique.

Steps to reproduce:

#+begin_src bash
emacs -Q
#+end_src

Setup minimal environment:

M-x package-initialize RET
M-x toggle-debug-on-error RET
M-x LaTeX-mode RET

Then type:

$$ "C-b" \Right "C-M-i"

The completion is actually executed, but triggers an error, whose 
backtrace is:

#+begin_verbatim
Debugger entered--Lisp error: (wrong-type-argument stringp (if 
TeX-insert-braces "{}"))
regexp-quote((if TeX-insert-braces "{}"))
TeX-complete-symbol()
funcall-interactively(TeX-complete-symbol)
call-interactively(TeX-complete-symbol nil nil)
command-execute(TeX-complete-symbol)
#+end_verbatim

The error is only triggered if the completion case is unique. If there are
multiple candidates, the "*Completions*" buffer will popup normally.

The issue affects, as far as I can tell, any symbol in 'LaTeX-math-default'
(probably 'LaTeX-math-list' too, but mine is nil) in the same 
circumstances.

Best,
Gustavo Barros

Emacs : GNU Emacs 26.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
of 2019-04-19
Package: 12.1.2

current state:
==============
(setq
AUCTeX-date "2019-02-08"
window-system 'x
LaTeX-version "2e"
TeX-style-path '("~/.emacs.d/auctex"
"/home/gustavo/.emacs.d/elpa/auctex-12.1.2/style"
"/home/gustavo/.emacs.d/auctex/auto"
"/home/gustavo/.emacs.d/auctex/style" "auto" "style")
TeX-auto-save nil
TeX-parse-self nil
TeX-master t
TeX-command-list '(("TeX"
"%(PDF)%(tex) %(file-line-error) %`%(extraopts) %S%(PDFout)%(mode)%' %t"
TeX-run-TeX nil
(plain-tex-mode ams-tex-mode texinfo-mode) :help
"Run plain TeX")
("LaTeX" "%`%l%(mode)%' %T" TeX-run-TeX nil
(latex-mode doctex-mode) :help "Run LaTeX")
("Makeinfo" "makeinfo %(extraopts) %t" TeX-run-compile nil
(texinfo-mode) :help "Run Makeinfo with Info output")
("Makeinfo HTML" "makeinfo %(extraopts) --html %t"
TeX-run-compile nil (texinfo-mode) :help
"Run Makeinfo with HTML output")
("AmSTeX" "amstex %(PDFout) %`%(extraopts) %S%(mode)%' %t"
TeX-run-TeX nil (ams-tex-mode) :help "Run AMSTeX")
("ConTeXt"
"%(cntxcom) --once --texutil %(extraopts) %(execopts)%t"
TeX-run-TeX nil (context-mode) :help "Run ConTeXt once")
("ConTeXt Full" "%(cntxcom) %(extraopts) %(execopts)%t"
TeX-run-TeX nil (context-mode) :help
"Run ConTeXt until completion")
("BibTeX" "bibtex %s" TeX-run-BibTeX nil t :help
"Run BibTeX")
("Biber" "biber %s" TeX-run-Biber nil t :help "Run Biber")
("View" "%V" TeX-run-discard-or-function t t :help
"Run Viewer")
("Print" "%p" TeX-run-command t t :help "Print the file")
("Queue" "%q" TeX-run-background nil t :help
"View the printer queue" :visible TeX-queue-command)
("File" "%(o?)dvips %d -o %f " TeX-run-dvips t t :help
"Generate PostScript file")
("Dvips" "%(o?)dvips %d -o %f " TeX-run-dvips nil t :help
"Convert DVI file to PostScript")
("Dvipdfmx" "dvipdfmx %d" TeX-run-dvipdfmx nil t :help
"Convert DVI file to PDF with dvipdfmx")
("Ps2pdf" "ps2pdf %f" TeX-run-ps2pdf nil t :help
"Convert PostScript file to PDF")
("Glossaries" "makeglossaries %s" TeX-run-command nil t
:help "Run makeglossaries to create glossary file")
("Index" "makeindex %s" TeX-run-index nil t :help
"Run makeindex to create index file")
("upMendex" "upmendex %s" TeX-run-index t t :help
"Run upmendex to create index file")
("Xindy" "texindy %s" TeX-run-command nil t :help
"Run xindy to create index file")
("Check" "lacheck %s" TeX-run-compile nil (latex-mode)
:help "Check LaTeX file for correctness")
("ChkTeX" "chktex -v6 %s" TeX-run-compile nil (latex-mode)
:help "Check LaTeX file for common mistakes")
("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil
t :help "Spell-check the document")
("Clean" "TeX-clean" TeX-run-function nil t :help
"Delete generated intermediate files")
("Clean All" "(TeX-clean t)" TeX-run-function nil t :help
"Delete generated intermediate and output files")
("Other" "" TeX-run-command t t :help
"Run an arbitrary command")
)
)