bug#4784: variable telnet-remote-echoes non-nil causes comint-previous-prompt to fail

[Richard Sharman]

When running the telnet command, if variable telnet-remote-echoes is
set,  then the command comint-previous-prompt deletes the field text
property that the command comint-previous-prompt uses (assuming that
variable comint-use-prompt-regexp is nil).  It also removes the
mouse-highlighting and so mouse-2 cannot be used to re-insert that
command.

There is no need for variable telnet-remote-echoes because variable
comint-process-echoes can be used to remove the second copy, and it does
it without removing the text properties.






In GNU Emacs 22.1.2 (i686-pc-linux-gnu, X toolkit)
 of 2008-03-14 on sharmanpc.mitel.com
Windowing system distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure  '--with-x-toolkit=athena' '--without-toolkit-scroll-bars''

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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Telnet

Minor modes in effect:
  highlight-changes-visible-mode: t
  shell-dirtrack-mode: t
  display-time-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
e <tab> <return> <return> C-y C-x C-e C-g C-a C-x b
* T <tab> <backspace> t e <tab> <return> C-y C-x C-e
C-c C-a C-c C-a C-k p w d <return> e c h o SPC h e
l l o <return> d a t e <return> C-y C-x C-e C-a C-k
C-x u C-c C-a C-c C-a C-k ( e c h o SPC C-y ) C-a c
C-a C-x u C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f
C-f C-f C-f e c h o SPC ' C-e ' <return> C-p C-e C-x
C-e q C-n C-n M-p C-x u <return> C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-2 C-e M-w C-f <up> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <right> <right>
<right> <right> <right> <right> <right> <left> <left>
C-f C-2 C-M-f M-w <end> <end> e c h o SPC C-y <return>
C-p C-e C-x C-e C-n <C-return> ( s e t q SPC C-y SPC
t ) <return> C-p C-p C-e C-x C-e C-n C-n p w d <return>
e c h o SPC n o w SPC i t SPC i s SPC s e t <return>
<return> <return> p w d <return> d a t e <return> C-y
C-a C-c C-a C-e C-x C-e M-b M-b M-b ( s e t q SPC C-e
SPC n i l ) <return> C-y M-b M-b M-b ( s e t q SPC
C-e SPC n i L ) <backspace> <backspace> l ) C-x C-e
C-x C-e <return> p w d <return> <help-echo> <help-echo>
<switch-frame> <switch-frame> <switch-frame> <switch-frame>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
Undo!
Mark set [5 times]
nil
t [2 times]
Mark set
t
Mark set
nil [2 times]
Loading emacsbug...done
C-c C-p is undefined

[Lars Ingebrigtsen]

[hidden email] writes:

> When running the telnet command, if variable telnet-remote-echoes is
> set,  then the command comint-previous-prompt deletes the field text
> property that the command comint-previous-prompt uses (assuming that
> variable comint-use-prompt-regexp is nil).  It also removes the
> mouse-highlighting and so mouse-2 cannot be used to re-insert that
> command.
>
> There is no need for variable telnet-remote-echoes because variable
> comint-process-echoes can be used to remove the second copy, and it does
> it without removing the text properties.

(I'm going through old bug reports that unfortunately got no response at
the time.)

I tried `M-x telnet' with `telnet-remote-echoes' set (and the other
variables also have the values described), and everything looks normal
to me.

I'm not sure what problem this bug report describes -- I have no mouse
highlight in the *telnet* buffer, and I'm not sure what that has to do
with do with `C-c C-p' (`comint-previous-point').

This is with Emacs 28, though, so perhaps what's being described here
has been fixed in the 11 years since this was reported.

--
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

[Lars Ingebrigtsen]

Lars Ingebrigtsen <[hidden email]> writes:

> I tried `M-x telnet' with `telnet-remote-echoes' set (and the other
> variables also have the values described), and everything looks normal
> to me.
>
> I'm not sure what problem this bug report describes -- I have no mouse
> highlight in the *telnet* buffer, and I'm not sure what that has to do
> with do with `C-c C-p' (`comint-previous-point').
>
> This is with Emacs 28, though, so perhaps what's being described here
> has been fixed in the 11 years since this was reported.

More information was requested, but no response was given within a
month, so I'm closing this bug report.  If the problem still exists,
please respond to this email and we'll reopen the bug report.

--
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no