Juri Linkov <juri@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 79857) by debbugs.gnu.org; 19 Nov 2025 07:22:47 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Nov 19 02:22:47 2025 Received: from localhost ([127.0.0.1]:34973 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1vLcWc-0007Oh-Gz for submit <at> debbugs.gnu.org; Wed, 19 Nov 2025 02:22:47 -0500 Received: from mout-p-102.mailbox.org ([80.241.56.152]:35452) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <juri@HIDDEN>) id 1vLcWV-0007Nt-HM; Wed, 19 Nov 2025 02:22:39 -0500 Received: from smtp102.mailbox.org (smtp102.mailbox.org [IPv6:2001:67c:2050:b231:465::102]) (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-102.mailbox.org (Postfix) with ESMTPS id 4dBCc71GXjz9v7B; Wed, 19 Nov 2025 08:22:31 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linkov.net; s=MBO0001; t=1763536951; 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: in-reply-to:in-reply-to:references:references; bh=99uGChb9ODQEcYiK3fo8AuZ+TkTzD3UpzKWtpLy1SJM=; b=VWZwOoe9BJha5U3q9uzTTqvgovcVA7IRb3bGI7sLT5JuJogHl3UnKK6irVa4GfjSl4iUAT pQIaBIlxGxy4oG2+tt6HonZ8igjkwqo3QUKrjkofKtytzagtdSqi5Z8eQJCr0l0ePGLCNk Gr1J59UQ3Y+DaJJd2HN5j3YQp9MVpqqjdS9cylAmvV6l1Cjj/6YAXH/79anXpzh5Q1WoKb umH2YGcQkoNP5Fc1x0lWgLY4SVUuZUlgB92I2VVfY39+y886xg0Qh8fyOHOTwnbpXQdmVM l0JIuzjeTC5WeC5bKR16htBmVsONinNBYqh2ghGA5pGII4nrtScMUJ5MWrBGww== Authentication-Results: outgoing_mbo_mout; dkim=none; spf=pass (outgoing_mbo_mout: domain of juri@HIDDEN designates 2001:67c:2050:b231:465::102 as permitted sender) smtp.mailfrom=juri@HIDDEN From: Juri Linkov <juri@HIDDEN> To: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= <eg642616@HIDDEN> Subject: Re: bug#79857: hideshow: Unbalanced parentheses In-Reply-To: <878qg3rwzk.fsf@HIDDEN> Organization: LINKOV.NET References: <87ikf7z32k.fsf@HIDDEN> <878qg3rwzk.fsf@HIDDEN> Date: Wed, 19 Nov 2025 09:20:27 +0200 Message-ID: <87jyzmtrno.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: 4dBCc71GXjz9v7B X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 79857 Cc: 79857 <at> debbugs.gnu.org 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: -1.7 (-) close 79857 31.0.50 thanks > I fixed it and an bug that made `hs-hide-level-recursive` infloop. Thanks for the patch, I pushed it with 'condition-case' instead of 'condition-case-unless-debug'.
bug-gnu-emacs@HIDDEN:bug#79857; Package emacs.
Full text available.Received: (at 79857) by debbugs.gnu.org; 18 Nov 2025 19:20:57 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Nov 18 14:20:56 2025 Received: from localhost ([127.0.0.1]:59404 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1vLRG4-0005fo-K9 for submit <at> debbugs.gnu.org; Tue, 18 Nov 2025 14:20:56 -0500 Received: from mout-p-103.mailbox.org ([2001:67c:2050:0:465::103]:47398) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <juri@HIDDEN>) id 1vLRG1-0005fO-GJ for 79857 <at> debbugs.gnu.org; Tue, 18 Nov 2025 14:20:54 -0500 Received: from smtp1.mailbox.org (smtp1.mailbox.org [10.196.197.1]) (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-103.mailbox.org (Postfix) with ESMTPS id 4d9vbG5Fkyz9tF7; Tue, 18 Nov 2025 20:20:42 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linkov.net; s=MBO0001; t=1763493642; 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: in-reply-to:in-reply-to:references:references; bh=u44HLFwPKRuT4TE1y8MK1ROuh02Fg0LvYvmA2Oj/g2o=; b=xw++wjIjVfTNZHExhjlHRgQVIYcJ5L+KtiPr4ye6kOuY6YagYT4AkMqod/kqBTbXPZuo/J ZIWWxwG3LQP0jilimUbXku7gEC1hwNrF5fAtWjLcdmNofLQKWGmznIki9TTO2w2ta4g+g7 KJL++52MFuezHuOmTl5uI8ImaskedP4PD/gpYG8se15I+mIt1a8je91zFyB82dCqZsK0fB 8qN3gt+TUai+I9sJELJSultOHEbdgkb+hBIwi20cDjK3d1jGKSXWLSdy/MAeKa8qI/Xcfa t6Wbw9pzjjEOp0NPZEdB/yvJRFJm3ROS311mrp9XvqSsQf4u4UcaXZKNpy5k5A== From: Juri Linkov <juri@HIDDEN> To: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= <eg642616@HIDDEN> Subject: Re: bug#79857: hideshow: Unbalanced parentheses In-Reply-To: <878qg3rwzk.fsf@HIDDEN> Organization: LINKOV.NET References: <87ikf7z32k.fsf@HIDDEN> <878qg3rwzk.fsf@HIDDEN> Date: Tue, 18 Nov 2025 21:16:57 +0200 Message-ID: <87pl9fw3py.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 79857 Cc: 79857 <at> debbugs.gnu.org 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: -1.7 (-) > + (condition-case-unless-debug _ I always run Emacs with with debug-on-error, so this condition-case-unless-debug still fails, but condition-case fixed this problem. I wonder why Emacs source has so many occurrences of condition-case-unless-debug? There are so many problems with it.
bug-gnu-emacs@HIDDEN:bug#79857; Package emacs.
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From: =?utf-8?Q?Elijah_Gabe_P=C3=A9rez?= <eg642616@HIDDEN>
To: Juri Linkov <juri@HIDDEN>
Subject: Re: bug#79857: hideshow: Unbalanced parentheses
In-Reply-To: <87ikf7z32k.fsf@HIDDEN>
References: <87ikf7z32k.fsf@HIDDEN>
Date: Tue, 18 Nov 2025 12:55:59 -0600
Message-ID: <878qg3rwzk.fsf@HIDDEN>
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Juri Linkov <juri@HIDDEN> writes:
> Some strange error occurs during font-lock in hs-minor-mode.
> Reproducible test case:
>
> 0. emacs -Q
> 1. Eval:
>
> (progn
> (setq backtrace-on-redisplay-error t)
> (setq hs-show-indicators t)
> (add-hook 'find-file-hook 'hs-minor-mode)
> (find-file (expand-file-name "lisp/frame.el" installation-directory))
> (search-forward "set-window-fringes")
> (reposition-window))
>
> This shows:
>
> =E2=9B=94 Warning (error): Error in a redisplay Lisp hook. See buffer *R=
edisplay-trace*
>
> And the buffer *Redisplay-trace* contains:
>
> Error: scan-error ("Unbalanced parentheses" 48293 48793)
> scan-sexps(48293 1)
> forward-sexp-default-function(1)
> forward-sexp(1)
> hs-forward-sexp((48293 48294 #<buffer frame.el>) 1)
> hs-block-positions()
> hs-hideable-region-p()
> hs-get-first-block()
> hs--add-indicators(48005 48793)
> jit-lock--run-functions(48005 48793)
> jit-lock-fontify-now(48005 48793)
> jit-lock-function(48005)
> repos-count-screen-lines(1 48793)
> reposition-window()
Yes, I forgot that forward-sexp can fail.
I fixed it and an bug that made `hs-hide-level-recursive` infloop.
--=-=-=
Content-Type: text/x-patch
Content-Disposition: attachment;
filename=0001-hideshow-Fix-regressions.-Bug-79857.patch
From 39323cec7d979aad09e517a30e3deb7b25e40109 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?El=C3=ADas=20Gabriel=20P=C3=A9rez?= <eg642616@HIDDEN>
Date: Tue, 18 Nov 2025 11:02:24 -0600
Subject: [PATCH] hideshow: Fix regressions. (Bug#79857)
* lisp/progmodes/hideshow.el (hs-block-positions): Exit the
function if 'hs-forward-sexp' fails.
(hs-hide-level-recursive): Fix infloop.
* test/lisp/progmodes/hideshow-tests.el (hideshow-hide-level-1):
(hideshow-hide-level-2): Update tests.
---
lisp/progmodes/hideshow.el | 66 +++++++++++++++------------
test/lisp/progmodes/hideshow-tests.el | 8 ++++
2 files changed, 45 insertions(+), 29 deletions(-)
diff --git a/lisp/progmodes/hideshow.el b/lisp/progmodes/hideshow.el
index 62bbbe40164..a738f51bdaa 100644
--- a/lisp/progmodes/hideshow.el
+++ b/lisp/progmodes/hideshow.el
@@ -794,34 +794,39 @@ hs-block-positions
This returns a list with the current code block beginning and end
positions. This does nothing if there is not a code block at current
point."
- (save-match-data
- (save-excursion
- (when (funcall hs-looking-at-block-start-predicate)
- (let ((mdata (match-data t))
- (header-end (match-end 0))
- block-beg block-end)
- ;; `block-start' is the point at the end of the block
- ;; beginning, which may need to be adjusted
- (save-excursion
- (when hs-adjust-block-beginning-function
- (goto-char (funcall hs-adjust-block-beginning-function header-end)))
- (setq block-beg (line-end-position)))
- ;; `block-end' is the point at the end of the block
- (hs-forward-sexp mdata 1)
- (setq block-end
- (cond ((and (stringp hs-block-end-regexp)
- (looking-back hs-block-end-regexp nil))
- (match-beginning 0))
- ((functionp hs-block-end-regexp)
- (funcall hs-block-end-regexp)
- (match-beginning 0))
- (t (point))))
- ;; adjust block end (if needed)
- (when hs-adjust-block-end-function
+ ;; `catch' is used here if the search fails due unbalanced parentheses
+ ;; or any other unknown error caused in `hs-forward-sexp'.
+ (catch 'hs-sexp-error
+ (save-match-data
+ (save-excursion
+ (when (funcall hs-looking-at-block-start-predicate)
+ (let ((mdata (match-data t))
+ (header-end (match-end 0))
+ block-beg block-end)
+ ;; `block-start' is the point at the end of the block
+ ;; beginning, which may need to be adjusted
+ (save-excursion
+ (when hs-adjust-block-beginning-function
+ (goto-char (funcall hs-adjust-block-beginning-function header-end)))
+ (setq block-beg (line-end-position)))
+ ;; `block-end' is the point at the end of the block
+ (condition-case-unless-debug _
+ (hs-forward-sexp mdata 1)
+ (scan-error (throw 'hs-sexp-error nil)))
(setq block-end
- (or (funcall hs-adjust-block-end-function block-beg)
- block-end)))
- (list block-beg block-end))))))
+ (cond ((and (stringp hs-block-end-regexp)
+ (looking-back hs-block-end-regexp nil))
+ (match-beginning 0))
+ ((functionp hs-block-end-regexp)
+ (funcall hs-block-end-regexp)
+ (match-beginning 0))
+ (t (point))))
+ ;; adjust block end (if needed)
+ (when hs-adjust-block-end-function
+ (setq block-end
+ (or (funcall hs-adjust-block-end-function block-beg)
+ block-end)))
+ (list block-beg block-end)))))))
(defun hs--make-indicators-overlays (beg)
"Helper function to make the indicators overlays."
@@ -1177,8 +1182,11 @@ hs-hide-level-recursive
(not (nth 8 (syntax-ppss)))) ; not inside comments or strings
(if (> arg 1)
(hs-hide-level-recursive (1- arg) minp maxp)
- (goto-char (match-beginning hs-block-start-mdata-select))
- (hs-hide-block-at-point t))))
+ ;; `hs-hide-block-at-point' already moves the cursor, but if it
+ ;; fails, return to the previous position where we were.
+ (unless (and (goto-char (match-beginning hs-block-start-mdata-select))
+ (hs-hide-block-at-point t))
+ (goto-char (match-end hs-block-start-mdata-select))))))
(goto-char maxp))
(defmacro hs-life-goes-on (&rest body)
diff --git a/test/lisp/progmodes/hideshow-tests.el b/test/lisp/progmodes/hideshow-tests.el
index a6b3ecfbd3d..9cf60c1ec84 100644
--- a/test/lisp/progmodes/hideshow-tests.el
+++ b/test/lisp/progmodes/hideshow-tests.el
@@ -254,6 +254,8 @@ hideshow-hide-level-1
Comments
*/
+\"String\"
+
int
main(int argc, char **argv)
{
@@ -270,6 +272,8 @@ hideshow-hide-level-1
Comments
*/
+\"String\"
+
int
main(int argc, char **argv)
{}
@@ -284,6 +288,8 @@ hideshow-hide-level-2
Comments
*/
+\"String\"
+
int
main(int argc, char **argv)
{
@@ -300,6 +306,8 @@ hideshow-hide-level-2
Comments
*/
+\"String\"
+
int
main(int argc, char **argv)
{
--
2.51.1
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From: Juri Linkov <juri@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: hideshow: Unbalanced parentheses
Organization: LINKOV.NET
X-Debbugs-Cc: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= <eg642616@HIDDEN>
Date: Tue, 18 Nov 2025 19:05:43 +0200
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Some strange error occurs during font-lock in hs-minor-mode.
Reproducible test case:
0. emacs -Q
1. Eval:
(progn
(setq backtrace-on-redisplay-error t)
(setq hs-show-indicators t)
(add-hook 'find-file-hook 'hs-minor-mode)
(find-file (expand-file-name "lisp/frame.el" installation-directory))
(search-forward "set-window-fringes")
(reposition-window))
This shows:
⛔ Warning (error): Error in a redisplay Lisp hook. See buffer *Redisplay-trace*
And the buffer *Redisplay-trace* contains:
Error: scan-error ("Unbalanced parentheses" 48293 48793)
scan-sexps(48293 1)
forward-sexp-default-function(1)
forward-sexp(1)
hs-forward-sexp((48293 48294 #<buffer frame.el>) 1)
hs-block-positions()
hs-hideable-region-p()
hs-get-first-block()
hs--add-indicators(48005 48793)
jit-lock--run-functions(48005 48793)
jit-lock-fontify-now(48005 48793)
jit-lock-function(48005)
repos-count-screen-lines(1 48793)
reposition-window()
Juri Linkov <juri@HIDDEN>:eg642616@HIDDEN, bug-gnu-emacs@HIDDEN.
Full text available.eg642616@HIDDEN, bug-gnu-emacs@HIDDEN:bug#79857; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.