bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs

[Eli Zaretskii]

> From: Michael Welsh Duggan <mwd@cert.org>
> Cc: "mwd@md5i.com" <mwd@md5i.com>,
>         "schwab@linux-m68k.org"
>  <schwab@linux-m68k.org>,
>         "47244@debbugs.gnu.org" <47244@debbugs.gnu.org>
> Date: Mon, 29 Mar 2021 11:33:02 -0400
> 
> >> `g` calls the following function:
> >> 
> >>     (defun gnus-server-exit ()
> >>       "Return to the group buffer."
> >>       (interactive nil gnus-server-mode)
> >>       (gnus-run-hooks 'gnus-server-exit-hook)
> >>       (gnus-kill-buffer (current-buffer))
> >
> > What is current-buffer at this point?
> 
> #<buffer *Server*>

I guess this means kill-buffer replaced "*Server*" with " *nntpd*",
but the selected-window's buffer is still "*Server*", which is being
killed?