bug#58210: 29.0.50; Visual line mode movement bug

bug#58210: 29.0.50; Visual line mode movement bug

[Jacky Li via Bug reports for GNU Emacs, the Swiss army knife of text editors]

If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
line above, resulting in a unwanted behaviour. This behaviour was not
observed in the build of Sept 24 HEAD, but in the build of Sept 30
HEAD. I suspect that the bug commit is within this period.

Also, this bug only happens when visual-line-mode is enabled. The
related interactive functions are (beginning-of-visual-line),
(end-of-visual-line), (kill-visual-line).


In GNU Emacs 29.0.50 (build 11, x86_64-pc-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.17.6) of 2022-10-01 built on artix
Repository revision: 2ceb09315c0d590d6f50ff8649066f260e35e7fb
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Artix Linux

Configured using:
 'configure --with-native-compilation --with-imagemagick --with-x
 --with-x-toolkit=gtk3 --with-xwidgets --with-xinput2 --with-mailutils'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3
THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM XWIDGETS
GTK3 ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=exwm-xim
  locale-coding-system: utf-8-unix

Major mode: Shell

Minor modes in effect:
  electric-pair-mode: t
  display-time-mode: t
  exwm-firefox-mode: t
  pixel-scroll-precision-mode: t
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  global-git-commit-mode: t
  magit-auto-revert-mode: t
  emms-playing-time-display-mode: t
  emms-playing-time-mode: t
  mood-line-mode: t
  global-tree-sitter-mode: t
  corfu-history-mode: t
  global-corfu-mode: t
  corfu-mode: t
  global-auto-revert-mode: t
  which-key-mode: t
  marginalia-mode: t
  savehist-mode: t
  vertico-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  shell-switcher-mode: t
  shell-dirtrack-mode: t
  org-roam-db-autosync-mode: t
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  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  column-number-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/jacky/.config/emacs/straight/build/jsonrpc/jsonrpc hides /usr/local/share/emacs/29.0.50/lisp/jsonrpc
/home/jacky/.config/emacs/straight/build/transient/transient hides /usr/local/share/emacs/29.0.50/lisp/transient
/home/jacky/.config/emacs/straight/build/project/project hides /usr/local/share/emacs/29.0.50/lisp/progmodes/project
/home/jacky/.config/emacs/straight/build/xref/xref hides /usr/local/share/emacs/29.0.50/lisp/progmodes/xref
/home/jacky/.config/emacs/straight/build/flymake/flymake hides /usr/local/share/emacs/29.0.50/lisp/progmodes/flymake
/home/jacky/.config/emacs/straight/build/eldoc/eldoc hides /usr/local/share/emacs/29.0.50/lisp/emacs-lisp/eldoc
/home/jacky/.config/emacs/straight/build/let-alist/let-alist hides /usr/local/share/emacs/29.0.50/lisp/emacs-lisp/let-alist

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bug#58210: 29.0.50; Visual line mode movement bug

[Eli Zaretskii]

> Date: Sat, 01 Oct 2022 11:14:35 +0800
> From:  Jacky Li via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
> line above, resulting in a unwanted behaviour. This behaviour was not
> observed in the build of Sept 24 HEAD, but in the build of Sept 30
> HEAD. I suspect that the bug commit is within this period.
> 
> Also, this bug only happens when visual-line-mode is enabled. The
> related interactive functions are (beginning-of-visual-line),
> (end-of-visual-line), (kill-visual-line).

Sorry about that, should be fixed now.

bug#58210: 29.0.50; Visual line mode movement bug

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> > Date: Sat, 01 Oct 2022 11:14:35 +0800
> > From:  Jacky Li via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >
> >
> > If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
> > line above, resulting in a unwanted behaviour. This behaviour was not
> > observed in the build of Sept 24 HEAD, but in the build of Sept 30
> > HEAD. I suspect that the bug commit is within this period.
> >
> > Also, this bug only happens when visual-line-mode is enabled. The
> > related interactive functions are (beginning-of-visual-line),
> > (end-of-visual-line), (kill-visual-line).
>
> Sorry about that, should be fixed now.

(vertical-motion 0) now moves to the previous line.  I think this is
not expected...?

Michael.

bug#58210: 29.0.50; Visual line mode movement bug

[Michael Heerdegen]

Michael Heerdegen <michael_heerdegen@web.de> writes:

> Eli Zaretskii <eliz@gnu.org> writes:

> > Sorry about that, should be fixed now.
>
> (vertical-motion 0) now moves to the previous line.  I think this is
> not expected...?

Your last fix doesn't seem to be the cause, must be some older commit
approx. two or three days ago.

Michael.

bug#58210: 29.0.50; Visual line mode movement bug

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: Jacky Li <drsl@drshapeless.com>,  58210@debbugs.gnu.org
> Date: Sat, 01 Oct 2022 13:00:57 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > > Date: Sat, 01 Oct 2022 11:14:35 +0800
> > > From:  Jacky Li via "Bug reports for GNU Emacs,
> > >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> > >
> > >
> > > If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
> > > line above, resulting in a unwanted behaviour. This behaviour was not
> > > observed in the build of Sept 24 HEAD, but in the build of Sept 30
> > > HEAD. I suspect that the bug commit is within this period.
> > >
> > > Also, this bug only happens when visual-line-mode is enabled. The
> > > related interactive functions are (beginning-of-visual-line),
> > > (end-of-visual-line), (kill-visual-line).
> >
> > Sorry about that, should be fixed now.
> 
> (vertical-motion 0) now moves to the previous line.  I think this is
> not expected...?

Did I fix this now?

bug#58210: 29.0.50; Visual line mode movement bug

[drshapeless via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Michael Heerdegen <michael_heerdegen@web.de>
>> Cc: Jacky Li <drsl@drshapeless.com>,  58210@debbugs.gnu.org
>> Date: Sat, 01 Oct 2022 13:00:57 +0200
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > > Date: Sat, 01 Oct 2022 11:14:35 +0800
>> > > From:  Jacky Li via "Bug reports for GNU Emacs,
>> > >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>> > >
>> > >
>> > > If visual-line-mode is turned on, using C-a, C-e or C-k will move to the
>> > > line above, resulting in a unwanted behaviour. This behaviour was not
>> > > observed in the build of Sept 24 HEAD, but in the build of Sept 30
>> > > HEAD. I suspect that the bug commit is within this period.
>> > >
>> > > Also, this bug only happens when visual-line-mode is enabled. The
>> > > related interactive functions are (beginning-of-visual-line),
>> > > (end-of-visual-line), (kill-visual-line).
>> >
>> > Sorry about that, should be fixed now.
>> 
>> (vertical-motion 0) now moves to the previous line.  I think this is
>> not expected...?
>
> Did I fix this now?

No, it becomes even weirder. C-k seems to be fixed.

For C-a, if the point is at an empty line, it works fine. But if the
point is at a line with any chars, it will move to the line above.

For C-e, it is fine on an empty line. It is also fine if the point is at
any position of a line with chars, except for at the end of a line, it
will still move to the line above.

bug#58210: 29.0.50; Visual line mode movement bug

[Michael Heerdegen]

Eli Zaretskii <eliz@gnu.org> writes:

> > (vertical-motion 0) now moves to the previous line.  I think this is
> > not expected...?
>
> Did I fix this now?

Better - but (vertical-motion 0) still moves one line backwards when the
current line number is exactly 2, or when the previous line is empty.

Michael.

bug#58210: 29.0.50; Visual line mode movement bug

[Eli Zaretskii]

> From: drshapeless <drsl@drshapeless.com>
> CC: 58210@debbugs.gnu.org
> Date: Sat, 01 Oct 2022 21:56:33 +0800
> 
> > Did I fix this now?
> 
> No, it becomes even weirder. C-k seems to be fixed.
> 
> For C-a, if the point is at an empty line, it works fine. But if the
> point is at a line with any chars, it will move to the line above.
> 
> For C-e, it is fine on an empty line. It is also fine if the point is at
> any position of a line with chars, except for at the end of a line, it
> will still move to the line above.

And now?

bug#58210: 29.0.50; Visual line mode movement bug

[drshapeless via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: drshapeless <drsl@drshapeless.com>
>> CC: 58210@debbugs.gnu.org
>> Date: Sat, 01 Oct 2022 21:56:33 +0800
>> 
>> > Did I fix this now?
>> 
>> No, it becomes even weirder. C-k seems to be fixed.
>> 
>> For C-a, if the point is at an empty line, it works fine. But if the
>> point is at a line with any chars, it will move to the line above.
>> 
>> For C-e, it is fine on an empty line. It is also fine if the point is at
>> any position of a line with chars, except for at the end of a line, it
>> will still move to the line above.
>
> And now?

Yes, it is fixed now.

bug#58210: 29.0.50; Visual line mode movement bug

[Eli Zaretskii]

> From: drshapeless <drsl@drshapeless.com>
> CC: 58210@debbugs.gnu.org
> Date: Sun, 02 Oct 2022 12:02:02 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: drshapeless <drsl@drshapeless.com>
> >> CC: 58210@debbugs.gnu.org
> >> Date: Sat, 01 Oct 2022 21:56:33 +0800
> >> 
> >> > Did I fix this now?
> >> 
> >> No, it becomes even weirder. C-k seems to be fixed.
> >> 
> >> For C-a, if the point is at an empty line, it works fine. But if the
> >> point is at a line with any chars, it will move to the line above.
> >> 
> >> For C-e, it is fine on an empty line. It is also fine if the point is at
> >> any position of a line with chars, except for at the end of a line, it
> >> will still move to the line above.
> >
> > And now?
> 
> Yes, it is fixed now.

Thanks, closing.