GNU bug report logs - #78693
14.0.9; Folding of math macros with a function spec is broken

Message received at submit <at> debbugs.gnu.org:

Received: (at submit) by debbugs.gnu.org; 4 Jun 2025 08:49:00 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 04 04:49:00 2025
Received: from localhost ([127.0.0.1]:46941 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1uMjnu-0007uX-DJ
	for submit <at> debbugs.gnu.org; Wed, 04 Jun 2025 04:48:59 -0400
Received: from lists.gnu.org ([2001:470:142::17]:60446)
 by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.84_2) (envelope-from <rahguzar@HIDDEN>)
 id 1uMjnq-0007st-Lx
 for submit <at> debbugs.gnu.org; Wed, 04 Jun 2025 04:48:56 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10])
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <rahguzar@HIDDEN>)
 id 1uMjnk-0006Qx-6y
 for bug-auctex@HIDDEN; Wed, 04 Jun 2025 04:48:48 -0400
Received: from mout-p-101.mailbox.org ([80.241.56.151])
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_CHACHA20_POLY1305:256)
 (Exim 4.90_1) (envelope-from <rahguzar@HIDDEN>)
 id 1uMjni-0001kl-4B
 for bug-auctex@HIDDEN; Wed, 04 Jun 2025 04:48:47 -0400
Received: from smtp2.mailbox.org (smtp2.mailbox.org [10.196.197.2])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256)
 (No client certificate requested)
 by mout-p-101.mailbox.org (Postfix) with ESMTPS id 4bC1Sx09MGz9sd7;
 Wed,  4 Jun 2025 10:48:33 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org;
 s=mail20150812; t=1749026913;
 h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
 to:to:cc:cc:mime-version:mime-version:content-type:content-type;
 bh=G/mvT4XMsfv0Ays0qYYtXaZV/1aDZIGZVOF/OVgkNns=;
 b=OWmgEryPIRAgUo92AtqfvwVTOo4xvquPuQNmzC7McW8BUxJBfhqbveDbnhMsaEgk9TCT5m
 ZcW3AxJBQB8A7NSwjRtuHulDirDBRDA1yzMMOFbIorvGarErymQ9+9CzY76uERpo6suK21
 +53g2LiiO1XpNZdSJyupBgx8Jl3fXJE8oySTGnwmFnaOc5udarAS+p0EJpo0LyyEmqGNFD
 7kI5kvW4cN8iUMdVa9LHWgkUadmZxBOeboTnKe6GRLBO9XoyDtmQlZxpDq+Q1372VewQcS
 grg5V+UPtW7buqIgrB38jXVN6ZN+/KKb9XwnQ2CK+UwpfEqVh9Z234m64A9vyg==
From: Rahguzar <rahguzar@HIDDEN>
To: bug-auctex@HIDDEN
Subject: 14.0.9; Folding of math macros with a function spec is broken
Date: Wed, 04 Jun 2025 13:48:28 +0500
Message-ID: <87bjr3nb8j.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="=-=-="
X-MBO-RS-META: ddiz8bzzszs3xzhf3cm84xmtautzfpxz
X-MBO-RS-ID: ce2494cff2d64b24087
Received-SPF: pass client-ip=80.241.56.151; envelope-from=rahguzar@HIDDEN;
 helo=mout-p-101.mailbox.org
X-Spam_score_int: -27
X-Spam_score: -2.8
X-Spam_bar: --
X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,
 DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,
 RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,
 RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001,
 SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: 1.0 (+)
X-Debbugs-Envelope-To: submit
Cc: ultrono@HIDDEN
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -0.0 (/)

--=-=-=
Content-Type: text/plain


Dear AucTeX maintainers,

The commits

d0a57d8d Fix math macro folding to not consume subsequent brackets
33f9eb07 Fix TeX macro end detection in some edge cases

break the folding of math macros with a function spec.

E.g. evaluate

(setq TeX-fold-math-spec-list `((,(lambda (text) (propertize text 'face '(underline))) ("underline"))))

and open the attached file. Do `M-x TeX-fold-mode RET` followed by `M-x
TeX-fold-buffer RET`. This results in

[Error: no content or function found]

getting displayed instead of \underline.

My config has many folding specs which are functions and all of them
exhibit the same behavior.

Reverting the commits above fixes the issue.

Thanks,
Rahguzar

Emacs  : GNU Emacs 30.1 (build 1, aarch64-redhat-linux-gnu, GTK+ Version 3.24.49, cairo version 1.18.2)
 of 2025-04-08
Package: 14.0.9

current state:
==============
(setq
 window-system 'pgtk
 LaTeX-version "2e"
 TeX-style-path '("/home/azeem/.local/state/emacs/auctex/" "/home/azeem/.local/state/emacs/elpaca/builds/auctex/style" "/home/azeem/.local/state/emacs/auctex/auto"
                  "/home/azeem/.local/state/emacs/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)%' %(output-dir) %t" TeX-run-TeX nil (plain-TeX-mode AmSTeX-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) %(o-dir) %t" TeX-run-compile nil (Texinfo-mode) :help "Run Makeinfo with Info output")
                    ("Makeinfo HTML" "makeinfo %(extraopts) %(o-dir) --html %t" TeX-run-compile nil (Texinfo-mode) :help "Run Makeinfo with HTML output")
                    ("AmSTeX" "amstex %(PDFout) %`%(extraopts) %S%(mode)%' %(output-dir) %t" TeX-run-TeX nil (AmSTeX-mode) :help "Run AMSTeX")
                    ("ConTeXt" "%(cntxcom) --once %(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 %(O?aux)" TeX-run-BibTeX nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode ConTeXt-mode) :help "Run BibTeX")
                    ("Biber" "biber %(output-dir) %s" TeX-run-Biber nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Run Biber")
                    ("Texindex" "texindex %s.??" TeX-run-command nil (Texinfo-mode) :help "Run Texindex")
                    ("Texi2dvi" "%(PDF)texi2dvi %t" TeX-run-command nil (Texinfo-mode) :help "Run Texi2dvi or Texi2pdf") ("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 (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Generate PostScript file")
                    ("Dvips" "%(o?)dvips %d -o %f " TeX-run-dvips nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Convert DVI file to PostScript")
                    ("Dvipdfmx" "dvipdfmx -o %(O?pdf) %d" TeX-run-dvipdfmx nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Convert DVI file to PDF with dvipdfmx")
                    ("Ps2pdf" "ps2pdf %f %(O?pdf)" TeX-run-ps2pdf nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Convert PostScript file to PDF")
                    ("LaTeXMk" "latexmk %(latexmk-out) %(file-line-error) %(output-dir) %`%(extraopts) %S%(mode)%' %t" TeX-run-TeX nil (LaTeX-mode docTeX-mode) :help "Run LaTeXMk")
                    ("Glossaries" "makeglossaries %(d-dir) %s" TeX-run-command nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help
                     "Run makeglossaries to create glossary file")
                    ("Index" "makeindex %(O?idx)" TeX-run-index nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Run makeindex to create index file")
                    ("upMendex" "upmendex %(O?idx)" TeX-run-index t (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :help "Run upmendex to create index file")
                    ("Xindy" "texindy %s" TeX-run-command nil (plain-TeX-mode LaTeX-mode docTeX-mode AmSTeX-mode Texinfo-mode) :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"))
 )

--=-=-=
Content-Type: application/x-tex
Content-Disposition: attachment; filename=test.tex
Content-Transfer-Encoding: base64

XGRvY3VtZW50Y2xhc3N7YXJ0aWNsZX0KClxiZWdpbntkb2N1bWVudH0KJFx1bmRlcmxpbmV7YWJj
fSQKXGVuZHtkb2N1bWVudH0K
--=-=-=--