GNU bug report logs - #47679
28.0.50; python-shell-switch-to-shell redisplay bug

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

From: Shitikanth Kashyap <shitikanth1 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; python-shell-switch-to-shell redisplay bug
Date: Sat, 10 Apr 2021 02:21:33 +0530

Steps to reproduce:
1. emacs -Q
2. Open any python file
3. Press "C-c C-p"  to start interpreter
4. Press "C-c C-z" from the file's window to switch to interpreter
5. Go back to file's window with "C-x o" and repeat from 4 a few times.

There is notable lag (sometimes as much as a few seconds) between
pressing the keybinding "C-c C-z" in file's window before the cursor
appears to be ready on the interpreter's window. The state of the cursor
in the two windows after the command appears to be indeterministic and
inconsistent.

The issue seems to be that the display of the two windows is not updated
even though internally emacs has changed the focus to the correct
window. For example, it is possible to start typing in the interpreter
window immediately after the command, even though the cursor does not
seem to ready.

Message #8 received at 47679 <at> debbugs.gnu.org (full text, mbox):

From: Shitikanth <shitikanth1 <at> gmail.com>
To: 47679 <at> debbugs.gnu.org
Subject: Re: bug#47679: 28.0.50; python-shell-switch-to-shell redisplay bug
Date: Sat, 10 Apr 2021 02:33:36 +0530

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

Proposed fix.

On Sat, 10 Apr 2021 at 02:22, Shitikanth Kashyap <shitikanth1 <at> gmail.com>
wrote:

> Steps to reproduce:
> 1. emacs -Q
> 2. Open any python file
> 3. Press "C-c C-p"  to start interpreter
> 4. Press "C-c C-z" from the file's window to switch to interpreter
> 5. Go back to file's window with "C-x o" and repeat from 4 a few times.
>
> There is notable lag (sometimes as much as a few seconds) between
> pressing the keybinding "C-c C-z" in file's window before the cursor
> appears to be ready on the interpreter's window. The state of the cursor
> in the two windows after the command appears to be indeterministic and
> inconsistent.
>
> The issue seems to be that the display of the two windows is not updated
> even though internally emacs has changed the focus to the correct
> window. For example, it is possible to start typing in the interpreter
> window immediately after the command, even though the cursor does not
> seem to ready.
>
>
>
>
>
>

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

[0001-Fix-python-shell-switch-to-shell-redisplay-bug.patch (application/octet-stream, attachment)]

Message #11 received at 47679 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Shitikanth <shitikanth1 <at> gmail.com>
Cc: 47679 <at> debbugs.gnu.org
Subject: Re: bug#47679: 28.0.50; python-shell-switch-to-shell redisplay bug
Date: Mon, 12 Apr 2021 10:44:15 +0200

Shitikanth <shitikanth1 <at> gmail.com> writes:

> Proposed fix.

Makes sense to me.

This change was small enough to apply without assigning copyright to the
FSF, but for future patches you want to submit, it might make sense to
get the paperwork started now, so that subsequent patches can be applied
speedily. Would you be willing to sign such paperwork?

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

Message #18 received at 47679 <at> debbugs.gnu.org (full text, mbox):

From: Shitikanth <shitikanth1 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 47679 <at> debbugs.gnu.org
Subject: Re: bug#47679: 28.0.50; python-shell-switch-to-shell redisplay bug
Date: Mon, 12 Apr 2021 23:55:39 +0530

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

Gladly. How should I start?

On Mon, 12 Apr 2021 at 14:14, Lars Ingebrigtsen <larsi <at> gnus.org> wrote:

> Shitikanth <shitikanth1 <at> gmail.com> writes:
>
> > Proposed fix.
>
> Makes sense to me.
>
> This change was small enough to apply without assigning copyright to the
> FSF, but for future patches you want to submit, it might make sense to
> get the paperwork started now, so that subsequent patches can be applied
> speedily. Would you be willing to sign such paperwork?
>
> --
> (domestic pets only, the antidote for overdose, milk.)
>    bloggy blog: http://lars.ingebrigtsen.no
>

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

Message #21 received at 47679 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Shitikanth <shitikanth1 <at> gmail.com>
Cc: 47679 <at> debbugs.gnu.org
Subject: Re: bug#47679: 28.0.50; python-shell-switch-to-shell redisplay bug
Date: Tue, 13 Apr 2021 09:34:39 +0200

Shitikanth <shitikanth1 <at> gmail.com> writes:

> Gladly. How should I start?

Here's the form to get started:


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