GNU bug report logs - #79010
Emacs freezes, leaving small gray buffer-menu popup on screen.

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

From: Jeffrey Brown <jeffbrown.the <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs freezes, leaving small gray buffer-menu popup on screen.
Date: Sun, 13 Jul 2025 14:29:35 -0500

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

Hello, unsung heroes.

I have attached a screenshot. Notice the little gray buffer-menu popup on
the right side. I don't know why it popped up. (I switch buffers using `C-x
C-b` or `Ctrl-TAB`. I was not trying to switch buffers when it crashed, but
I may have mis-typed some key command.)
[image: emacs-crashes-with-popup-buffer-menu.png]

The popup was surprisingly persistent. It stayed overlaid on my screen even
as I navigated to a different desktop, away from the one with Emacs. (The
main Emacs windows did not disappear, but unlike the popup it behaved
itself, staying on the desktop where I had launched it.) The main window
eventually became gray. (I have no screenshot of the window once it had
turned gray, only before.)

Normally I kill emacs and restart. This time that didn't work, until I used
the `-9` option to the `kill` shell command.

This kind of crash has happened to me many times before, at least once a
week for, I think, months. Sorry for not reporting sooner.

I use NixOS, the Linux kernal 6.15.3, and Plasma 6.3.6 on an HP laptop.

Thank you,
Jeff

-- 
Jeff Brown | Jeffrey Benjamin Brown
LinkedIn <https://www.linkedin.com/in/jeffreybenjaminbrown>   |   Github
<https://github.com/jeffreybenjaminbrown>

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

[emacs-crashes-with-popup-buffer-menu.png (image/png, inline)]

Message #8 received at 79010 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jeffrey Brown <jeffbrown.the <at> gmail.com>
Cc: 79010 <at> debbugs.gnu.org
Subject: Re: bug#79010: Emacs freezes,
 leaving small gray buffer-menu popup on screen.
Date: Mon, 14 Jul 2025 14:07:59 +0300

> From: Jeffrey Brown <jeffbrown.the <at> gmail.com>
> Date: Sun, 13 Jul 2025 14:29:35 -0500
> 
> I have attached a screenshot. Notice the little gray buffer-menu popup on the right side. I don't know why it
> popped up. (I switch buffers using `C-x C-b` or `Ctrl-TAB`. I was not trying to switch buffers when it crashed,
> but I may have mis-typed some key command.)
> emacs-crashes-with-popup-buffer-menu.png
> 
> The popup was surprisingly persistent. It stayed overlaid on my screen even as I navigated to a different
> desktop, away from the one with Emacs. (The main Emacs windows did not disappear, but unlike the popup
> it behaved itself, staying on the desktop where I had launched it.) The main window eventually became gray.
> (I have no screenshot of the window once it had turned gray, only before.)
> 
> Normally I kill emacs and restart. This time that didn't work, until I used the `-9` option to the `kill` shell
> command.
> 
> This kind of crash has happened to me many times before, at least once a week for, I think, months. Sorry
> for not reporting sooner.

Please run Emacs under GDB (assuming that your Emacs binary is not
stripped of debugging symbols), and when it crashes like this next
time, and G|DB kicks in, type the following at the GDB prompt:

  (gdb) thread apply all bt

and post here everything that GDB prints as result.

Also, please invoke "M-x report-emacs-bug" and post here all the
information about your system and Emacs build and configuration which
that command collects.

Thanks.

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