bug#41584: closed (26.3; org-indent-mode's line-prefix text property flickers near overlays)

[GNU bug Tracking System]

Your message dated Fri, 29 May 2020 22:32:11 +0200
with message-id <871rn25vp0.fsf@gmail.com>
and subject line Re: bug#41584: 26.3; org-indent-mode's line-prefix text 
property flickers near overlays
has caused the debbugs.gnu.org bug report #41584,
regarding 26.3; org-indent-mode's line-prefix text property flickers near 
overlays
to be marked as done.

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-- 
41584: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=41584
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> --- Begin Message ---
>
>
>
> Subject: 
>
> 26.3; org-indent-mode's line-prefix text property flickers near overlays
>
>
>
>
> Date: 
>
> Thu, 28 May 2020 21:54:09 +0200
>
>
>
>
> Hello,
>
> The line-prefix text property set by org-indent-mode sometimes vanishes
> when typing near a line where an overlay is applied.  To reproduce:
>
> - emacs -Q
> - C-x C-f repro.org
> - M-x org-indent-mode
> - M-: (insert "* heading\ntext")
> - M-:
> (let ((ov (make-overlay (point-at-bol) (point-at-bol)))
>       (val (propertize " " 'display '((left-fringe right-triangle)))))
>   (overlay-put ov 'before-string val))
> - RET
> - a
>
> When "a" is inserted, org-indent-mode's line-prefix disappears on the
> *previous* line ("text").  It remains gone as long as I type
> self-inserting characters, until
>
> - I type certain commands, e.g. RET or C-j, or
>
> - I insert a closing delimiter that makes
>   blink-paren-post-self-insert-function blink the corresponding opening
>   delimiter, e.g. ')' or ']'.
>
> Then the line-prefix shows up again.
>
>
> This recipe is simplified; I originally found this bug in Org files
> under version control with diff-hl-flydiff-mode enabled.  When typing in
> new content, the preceding line is shoved to the left until I stop
> typing; after diff-hl-flydiff-delay, diff-hl's idle timer kicks in and
> updates its overlay, which as a side-effect makes org-indent-mode's
> line-prefix come back up.
>
> See [1] for my original bug report to diff-hl and some crude
> "analysis".
>
>
> I'm clearly out of my depth; at least I hope I used the correct terms to
> describe the symptoms I've observed.  Let me know if there is anything I
> can do to help debug this.
>
> Thank you for your time.
>
>
> [1] https://github.com/dgutov/diff-hl/issues/142
>
>
> In GNU Emacs 28.0.50 (build 21, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, 
> cairo version 1.16.0)
>  of 2020-05-18 built on my-little-tumbleweed
> Repository revision: b1fe27d77db8f819641231ca46725f3eed0b4d9b
> Repository branch: master
> Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
> System Description: openSUSE Tumbleweed
>
> Configured using:
>  'configure --with-xwidgets --with-cairo'
>
> Configured features:
> XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
> INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
> ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS JSON
> PDUMPER LCMS2 GMP
>
> Important settings:
>   value of $LC_CTYPE: en_US.UTF-8
>   value of $LC_TIME: en_GB.UTF-8
>   value of $LANG: en_US.UTF-8
>   value of $XMODIFIERS: @im=local
>   locale-coding-system: utf-8-unix
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#41584: 26.3; org-indent-mode's line-prefix text property flickers near overlays
>
>
>
>
> Date: 
>
> Fri, 29 May 2020 22:32:11 +0200
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)
>
>
>
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > Fixed.
>
> AFAICT you've scared the moles away, so I'll boldly close this report.
> Thanks a lot for the efficient whacking!
>
> (I guess xdisp.c is something we won't to touch with a 10-foot pole on
> the release branch, especially for a bug that users have lived with for
> so long?)
>
>
> --- End Message ---