bug#2244: 23.0.90; longlines-mode arrow key disabling bug

bug#2244: 23.0.90; longlines-mode arrow key disabling bug

[Jim Apple]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

In longlines mode, showing hard newlines, in terminal mode, make a
line with n characters, a hard return, and a line with n+1 characters:

123
1234

Placing the cursor over the fourth character in the second line, the
up arrow key moves to the line above. After that, however, it does not
move the cursor at all.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/local/share/emacs/23.0.90/etc/DEBUG for instructions.


In GNU Emacs 23.0.90.2 (i686-pc-linux-gnu, GTK+ Version 2.14.7)
 of 2009-02-08 on rice
configured using `configure  '--with-x-toolkit' '--with-xft' 'CC=gcc''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  longlines-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  use-hard-newlines: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
B ESC O B ESC O B ESC O B ESC O B ESC O B ESC O B ESC
O B ESC O B ESC O B C-w ESC O B ESC O A ESC O A ESC
O A ESC O A ESC O A ESC O A ESC O A ESC O A ESC O A
C-l ESC O A ESC O A ESC O B ESC O B ESC O B ESC O C
ESC O C ESC O C ESC O C ESC O C ESC O C ESC O A ESC
O A ESC O A ESC O A ESC O A C-l ESC O A ESC O A ESC
O B ESC O B ESC O B ESC O B ESC O B ESC O B ESC O B
ESC O B ESC O B ESC O B ESC O B ESC O B ESC O B ESC
O B ESC O B ESC O B ESC O B ESC O B ESC O B ESC O B
ESC O B ESC x r e p o r t TAB TAB RET C-g ESC O A ESC
O A ESC O A ESC O A ESC O A ESC O A ESC O A ESC O A
ESC O A ESC O A ESC O A ESC O A ESC O D ESC O D ESC
O A ESC O A ESC O A ESC O A ESC O D ESC O D C-@ ESC
O B ESC O B ESC O B ESC O B ESC O B ESC O B ESC O B
ESC O B ESC O B ESC O B ESC O B ESC O B ESC w ESC x
r e p o TAB r t TAB RET

Recent messages:
("emacs")
For information about GNU Emacs and the GNU system, type C-h C-a.
Longlines mode enabled
Mark set
Quit
Mark set
Making completion list...

bug#2244: 23.0.90; longlines-mode arrow key disabling bug

[Chong Yidong]

> In longlines mode, showing hard newlines, in terminal mode, make a
> line with n characters, a hard return, and a line with n+1 characters:
>
> 123
> 1234
>
> Placing the cursor over the fourth character in the second line, the
> up arrow key moves to the line above. After that, however, it does not
> move the cursor at all.

I'm afraid I can't reproduce this bug.  Could you provide an exact
recipe, containing precise keystrokes, starting from `emacs -Q -nw'?

bug#2244: 23.0.90; longlines-mode arrow key disabling bug

[Jim Apple]

On Thu, Feb 12, 2009 at 5:57 AM, Chong Yidong <cyd@stupidchicken.com> wrote:
> I'm afraid I can't reproduce this bug.  Could you provide an exact
> recipe, containing precise keystrokes, starting from `emacs -Q -nw'?

In GNU Emacs 23.0.90.2 (i686-pc-linux-gnu, GTK+ Version 2.14.7)
 of 2009-02-08 on rice
configured using `configure  '--with-x-toolkit' '--with-xft' 'CC=gcc''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=imsettings
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  longlines-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  use-hard-newlines: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC [ > 1 ; 1 7 0 4 ; 0 c ESC x l o n TAB RET ESC x
l o n g TAB s h TAB RET 1 2 3 RET 1 2 3 4 ESC O D ESC
O A ESC O A ESC x r e p o TAB r TAB RET

Recent messages:
("emacs" "-Q")
For information about GNU Emacs and the GNU system, type C-h C-a.
Longlines mode enabled
Making completion list...


Here's the result when I do the same without "-nw". The bugs show up
just the same:

Recent input:
M-x l o n g l i n e s - m o d e <return> M-x l o n
g l i n e s - s h o w - h a r d - n e w l i n e s <return>
1 2 3 <return> 1 2 3 4 <left> <up> <up> M-x r e p o
r t <return>

bug#2244: 23.0.90; longlines-mode arrow key disabling bug

[Xue Fuqiao]

I can't reproduce this either.  Moreover, longlines.el is obsolete now,
please try visual-line-mode and the visual-fill-column package.
Closing.

Some related information:

* https://emacs.stackexchange.com/questions/10798/if-longlines-mode-is-removed-in-new-emacs-how-can-i-soft-wrap-the-line-around-t
* http://emacshorrors.com/posts/longlines-mode.html