bug#6058: 22 and 23: yanking unreliable in telnet-mode

[Stefan Kangas]

The below bug was reported 10 years ago.  Is this still an issue in a
modern version of Emacs, such as the recently released version 27.1?

Thanks in advance.

David Reitter <david.reitter@gmail.com> writes:

> This seems to be in Emacs 22 (Carbon) as well as Emacs 23 (NS).
>
> Begin forwarded message:
>
>> From: Warren Harris <warrensomebody@gmail.com>
>> Date: April 27, 2010 6:41:53 PM EDT
>> To: Bug reports for Aquamacs Emacs <aquamacs-bugs@aquamacs.org>
>> Cc: David Reitter <david.reitter@gmail.com>
>> Subject: Re: [Aquamacs-bugs] text becomes mangled in telnet mode
>>
>> [resend]
>>
>> This problem still persists in 2.0b5 and the nightly build from 4/22.
>>
>> Warren
>>
>> On Jan 13, 2010, at 11:49 AM, David Reitter wrote:
>>
>>> Warren,
>>> this should not occur at all, of course.
>>> Could you please try this with a nightly build of Aquamacs (save and move 
>>> away your customizations, please), so I can forward your bug report to the 
>>> Emacs maintainers?
>>>
>>> Thanks
>>> - David
>>>
>>>
>>> On Jan 5, 2010, at 3:46 PM, Warren Harris wrote:
>>>
>>>> I regularly bring up telnet sessions under Aquamacs (with M-x telnet). This
>>>> is nice because I can paste a large multiline block of text into the buffer
>>>> and edit it before positioning my cursor at the end, and hitting return to
>>>> submit it to the remote process. However, after submitting it, the text in
>>>> the buffer that was submitted often becomes badly mangled -- large chunks 
>>>> of
>>>> it seem to be dropped out, or pieces get rearranged somehow. It is not
>>>> possible to cut&paste it any more since it is now irreparably changed
>>>> (although the previously submitted text can be yanked back with M-p
>>>> (creating a new block at the cursor location)).
>>>>
>>>> I've gotten used to dealing with this behavior over time, but last night I
>>>> saw a very similar problem in my shell window too. I ran a command that
>>>> produced a considerable amount of output including utf-8
>>>> characters. Scrolling back through the output in my buffer showed many
>>>> display glitches -- text was arbitrary dropped out in places or
>>>> rearranged. However, in this case, C-l was able to restore the correct text
>>>> (so perhaps this is a different problem -- display bug rather than the text
>>>> in the buffer actually being munged as it is telnet windows).
>>>>
>>>> Warren
>>>>
>>>>
>>>> In GNU Emacs 22.3.1 (i386-apple-darwin9.8.0, Carbon Version 1.6.0)
>>>> of 2009-09-29 on braeburn.aquamacs.org - Aquamacs Distribution 1.9
>>>> Windowing system distributor `Apple Inc.', version 10.5.8
>>>> configured using `configure  '--without-x' '--prefix=/usr/local' 
>>>> 'CFLAGS=-DMAC_OS_X_VERSION_MIN_REQUIRED=1040 -g -O9 -mtune=nocona -pipe 
>>>> -fomit-frame-pointer''
>>>>
>>>> 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: nil
>>>> locale-coding-system: iso-8859-1
>>>> default-enable-multibyte-characters: t
>>>>
>>>> Major mode: Shell
>>>>
>>>> Minor modes in effect:
>>>> shell-dirtrack-mode: t
>>>> savehist-mode: t
>>>> smart-frame-positioning-mode: t
>>>> aquamacs-autoface-mode: t
>>>> global-visual-line-mode: t
>>>> visual-line-mode: t
>>>> recentf-mode: t
>>>> encoded-kbd-mode: t
>>>> osx-key-mode: t
>>>> show-paren-mode: t
>>>> delete-selection-mode: t
>>>> pc-selection-mode: t
>>>> cua-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
>>>> column-number-mode: t
>>>> line-number-mode: t
>>>> transient-mark-mode: t
>>>>
>>>> Recent input:
>>>> <help-echo> C-x C-f L i b <tab> A p <tab> <M-backspace>
>>>> <M-backspace> L i b <tab> P r e <tab> A q <tab> / <tab>
>>>> <tab> P r e <tab> <return> C-x C-f <return> C-n C-n
>>>> C-n C-n C-n f C-s b a r C-s C-s C-s C-s C-s C-s C-s
>>>> C-a C-x 3 C-x C-b C-x o C-n C-n C-n C-p C-p f C-n f
>>>> C-n C-n C-n C-e C-a C-x k <return> C-n f C-x k <return>
>>>> C-n f C-x k <return> C-p C-p C-p C-p f C-x k <return>
>>>> C-p f C-x k <return> <help-echo> <down-mouse-1> <mouse-1>
>>>> C-a <f5> <menu-bar> <help-menu> <bug-diagnosis> <send-emacs-bug-report>
>>>> <wheel-down> <double-wheel-down> <triple-wheel-down>
>>>> <wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
>>>> <S-return> <A-return> <A-S-return> <A-S-return> <menu-bar>
>>>> <help-menu> <bug-diagnosis> <send-emacs-bug-report>
>>>> <menu-bar> <help-menu> <bug-diagnosis> <send-emacs
>>>> -bug-report>
>>>>
>>>> Recent messages:
>>>> Mark set [2 times]
>>>> Sending...
>>>> Loading mailclient...done
>>>> Loading browse-url...done
>>>> Sending...done
>>>> byte-code: Beginning of buffer
>>>> Press <A-S-return> to exit full screen editing.
>>>> Truncate long lines disabled
>>>> Mark set [2 times]
>>>> Sending...done
>>>>
>>>> Command line: (/Applications/Aquamacs Emacs.app/Contents/MacOS/Aquamacs 
>>>> Emacs)
>>>>
>>>> PATH:
>>>> /Users/warren/metaweb/mwbuild3/_work/gd/graphutil:/opt/local/bin:/Users/warren/bin:/Users/warren/godi/bin:/Users/warren/godi/sbin:/usr/local/bin:/opt/local/lib/postgresql83/bin:/sw/bin:/Users/warren/metaweb/mwbuild3/_work/gd/graphutil:/opt/local/bin:/Users/warren/bin:/Users/warren/godi/bin:/Users/warren/godi/sbin:/usr/local/bin:/opt/local/lib/postgresql83/bin:/sw/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/Users/warren/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/texbin
>>>>
>>>> exec-path: (/Users/warren/metaweb/mwbuild3/_work/gd/graphutil 
>>>> /opt/local/bin
>>>> /Users/warren/bin /Users/warren/godi/bin /Users/warren/godi/sbin
>>>> /usr/local/bin /opt/local/lib/postgresql83/bin /sw/bin
>>>> /Users/warren/metaweb/mwbuild3/_work/gd/graphutil /opt/local/bin
>>>> /Users/warren/bin /Users/warren/godi/bin /Users/warren/godi/sbin
>>>> /usr/local/bin /opt/local/lib/postgresql83/bin /sw/bin /usr/bin /bin
>>>> /usr/sbin /sbin /usr/local/bin /usr/X11/bin /Users/warren/bin /usr/bin /bin
>>>> /usr/sbin /sbin /Applications/Aquamacs Emacs.app/Contents/MacOS/libexec
>>>> /Applications/Aquamacs Emacs.app/Contents/MacOS/bin /usr/texbin)
>>>> _______________________________________________
>>>> Aquamacs-bugs mailing list
>>>> Aquamacs-bugs@aquamacs.org
>>>> http://lists.aquamacs.org/mailman/listinfo.cgi/aquamacs-bugs
>>>
>>