GNU bug report logs - #20251
24.5; backward-list does nothing useful in inferior-python-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eric Hanchrow <eric.hanchrow <at> gmail.com>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 24.5; backward-list does nothing useful in inferior-python-mode
Date: Fri, 03 Apr 2015 18:03:26 +0000

[Message part 1 (text/plain, inline)]

* I started emacs with `emacs -Q -nw'.
* I started an interactive Python REPL with ESC x r u n - p y t h o n RET
* I entered a very simple statement: l SPC = SPC [ 1 , SPC 2 , SPC 3 ] RET
* I then tried to position point at the [: ESC x b a c k w a r d - l i s t
RET

I noticed, to my dismay, that point was now at the beginning of the
buffer, and not before the [.




In GNU Emacs 24.5.1 (i686-pc-linux-gnu)
 of 2015-04-03 on ip-10-229-27-45
Repository revision: 0ad5fe01aea8073e2b9f24c322bd1e9c4b83ca9b
System Description: Ubuntu 14.04.2 LTS

Configured using:
 `configure --without-x'

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Inferior Python

Minor modes in effect:
  compilation-shell-minor-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making python-shell-interpreter local to *Python* while let-bound!
Making python-shell-interpreter-args local to *Python* while let-bound!
Sent python-shell-completion-setup-code
Sent python-ffap-setup-code
Sent python-eldoc-setup-code

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None found.

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Memory information:
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 (vectors 8 9568)
 (vector-slots 4 372842 2522)
 (floats 8 63 552)
 (intervals 28 187 0)
 (buffers 512 12)
 (heap 1024 17847 522))

[Message part 2 (text/html, inline)]

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#20251: 24.5;
 backward-list does nothing useful in inferior-python-mode
Date: Sat, 04 Apr 2015 09:41:01 +0200

Am 03.04.2015 um 20:03 schrieb Eric Hanchrow:
> * I started emacs with `emacs -Q -nw'.
> * I started an interactive Python REPL with ESC x r u n - p y t h o n RET
> * I entered a very simple statement: l SPC = SPC [ 1 , SPC 2 , SPC 3 ] RET
> * I then tried to position point at the [: ESC x b a c k w a r d - l i 
> s t RET
>
> I noticed, to my dismay, that point was now at the beginning of the
> buffer, and not before the [.
>

IIUC cursor was at the opening bracket, i.e. at the beginning of list. 
In that case Emacs would search the previous list - and end at BOB if no 
other list found.

Nonetheless probably it would be useful if in comint-modes position of 
prompt is taken for point-min.

Message #11 received at 20251 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eric Hanchrow <eric.hanchrow <at> gmail.com>
Cc: 20251 <at> debbugs.gnu.org
Subject: Re: bug#20251: 24.5; backward-list does nothing useful in
 inferior-python-mode
Date: Fri, 28 May 2021 02:39:59 +0200

Eric Hanchrow <eric.hanchrow <at> gmail.com> writes:

> * I started emacs with `emacs -Q -nw'.
> * I started an interactive Python REPL with ESC x r u n - p y t h o n RET
> * I entered a very simple statement: l SPC = SPC [ 1 , SPC 2 , SPC 3 ] RET
> * I then tried to position point at the [: ESC x b a c k w a r d - l i s t RET
>
> I noticed, to my dismay, that point was now at the beginning of the
> buffer, and not before the [.

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

I'm unable to reproduce the problem in Emacs 28, so I'm going to go
ahead and guess that this has been fixed in the years since it was
reported, and I'm closing this bug report. If this is still a problem,
please respond to the debbugs address and we'll reopen.

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

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