GNU bug report logs - #79140
29.1; Editing the occur buffer: not possible to remove lines

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jurgen De Backer <jurgen.de-backer.ext <at> eurocontrol.int>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 29.1; Editing the occur buffer: not possible to remove lines
Date: Fri, 1 Aug 2025 16:57:02 +0000

Hi,

When comparing the behaviour of editing the occur buffer,
we noted that in emacs 29.1 it is no longer possible to remove entire lines of
occurrences.

When I do an occur, I often want to filter the result by using delete-matching lines.
I used to do that by doing  C-x C-q   (toggle read only).
But since emacs 29.1 the text itself is marked read only. At least the
line number of the match can no longer be deleted.




In GNU Emacs 29.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.30,
 cairo version 1.15.12) of 2025-06-29 built on dhdevd15
Windowing system distributor 'Moba/X', version 11.0.12004000
System Description: Red Hat Enterprise Linux 8.10 (Ootpa)

Configured using:
 'configure
 --prefix=/cm/ot/TOOL/GNU!28.0.0.150/build_G!30.IP.L8/generated
 --exec-prefix=/cm/ot/TOOL/GNU!28.0.0.150/build_G!30.IP.L8/generated/libexec/emacs-29.1
 --mandir=/cm/ot/TOOL/GNU!28.0.0.150/build_G!30.IP.L8/generated/man
 --with-x-toolkit=gtk3 --with-modules --without-gconf
 --without-gsettings --without-dbus --with-xft --with-gif=yes
 --with-gnutls=no --enable-link-time-optimization
 'CFLAGS=-I/cm/ot/TOOL/GNU!28.0.0.150/build_G!30.IP.L8/generated/include
 ' LDFLAGS=-L/cm/ot/TOOL/GNU!28.0.0.150/build_G!30.IP.L8/generated/lib'

Configured features:
ACL CAIRO FREETYPE GIF GLIB GMP GPM HARFBUZZ JPEG LCMS2 LIBSELINUX
LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG SECCOMP SOUND SQLITE3 THREADS
TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $EMACSDATA: /cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/share/emacs/29.1/etc
  value of $EMACSDOC: /cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/share/emacs/29.1/etc
  value of $EMACSLOADPATH: /cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/share/emacs/29.1/site-lisp:/cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/share/emacs/site-lisp:/cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/share/emacs/29.1/lisp
  value of $EMACSPATH: /cm/ot/TOOL/GNU.28.0.0.150/build_G.30.IP.L8/generated/libexec/emacs-29.1/libexec/emacs/29.1/x86_64-pc-linux-gnu:
  value of $LANG: C
  locale-coding-system: nil

Major mode: Lisp Interaction

Minor modes in effect:
  shell-dirtrack-mode: t
  global-display-line-numbers-mode: t
  display-line-numbers-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

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Features:
(shadow sort mail-extr cl-extra help-mode warnings emacsbug message
yank-media puny rfc822 mml mml-sec epa derived epg rfc6068 epg-config
gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils ob-perl ob-python ob-shell shell
display-line-numbers gnat-compiler-autoloads ada-mode-autoloads
two-column gpc dired dired-loaddefs etags fileloop generator which-func
ido ada-mode wisi-process-parse align ada-skel wisi-skel skeleton
ada-indent-user-options ada-imenu imenu ada-core uniquify-files
gnat-compiler wisi-prj wisi xref project wisi-fringe wisi-parse-common
semantic/lex semantic/fw mode-local find-file compile
text-property-search highlight-beyond-fill-column cperl-mode rx facemenu
jka-compr which-key vlf-setup vlf vlf-base vlf-tune org ob ob-tangle
ob-ref ob-lob ob-table ob-exp org-macro org-footnote org-src ob-comint
org-pcomplete pcomplete org-list org-faces org-entities time-date
noutline outline icons org-version ob-emacs-lisp ob-core ob-eval
org-table ol org-keys org-compat advice org-macs org-loaddefs
format-spec find-func cal-menu calendar cal-loaddefs memory-usage ffap
thingatpt comint ansi-osc ansi-color ring finder-inf
solarized-theme-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie generate-lisp-file
url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv
bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip
cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads inotify lcms2 dynamic-setting
font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
make-network-process emacs)

Memory information:
((conses 16 175839 11707)
 (symbols 48 18274 0)
 (strings 32 64016 2572)
 (string-bytes 1 2022367)
 (vectors 16 35023)
 (vector-slots 8 627723 61353)
 (floats 8 121 83)
 (intervals 56 322 0)
 (buffers 976 11))
____

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Message #8 received at 79140 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jurgen De Backer <jurgen.de-backer.ext <at> eurocontrol.int>
Cc: 79140 <at> debbugs.gnu.org
Subject: Re: bug#79140: 29.1;
 Editing the occur buffer: not possible to remove lines
Date: Thu, 07 Aug 2025 17:21:58 +0300

> Date: Fri, 1 Aug 2025 16:57:02 +0000
> From:  Jurgen De Backer via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> When comparing the behaviour of editing the occur buffer,
> we noted that in emacs 29.1 it is no longer possible to remove entire lines of
> occurrences.
> 
> When I do an occur, I often want to filter the result by using delete-matching lines.
> I used to do that by doing  C-x C-q   (toggle read only).
> But since emacs 29.1 the text itself is marked read only. At least the
> line number of the match can no longer be deleted.

See bug#53419 for why we made that change.

You could remove the read-only text properties from the buffer in your
occur-mode-hook, I think.  Did you try that?

Message #11 received at 79140 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Jurgen De Backer <jurgen.de-backer.ext <at> eurocontrol.int>
Cc: 79140 <at> debbugs.gnu.org
Subject: Re: bug#79140: 29.1; Editing the occur buffer: not possible to
 remove lines
Date: Fri, 08 Aug 2025 09:20:10 +0300

forcemerge 79140 75996
thanks

> When comparing the behaviour of editing the occur buffer,
> we noted that in emacs 29.1 it is no longer possible to remove entire lines of
> occurrences.
>
> When I do an occur, I often want to filter the result by using delete-matching lines.
> I used to do that by doing  C-x C-q   (toggle read only).
> But since emacs 29.1 the text itself is marked read only. At least the
> line number of the match can no longer be deleted.

Thanks for the bug report.  We are fixing it in bug#75530 and bug#75996.
Sorry for no progress so far.

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