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>, "rudalics@gmx.at" <rudalics@gmx.at>,
>         "schwab@linux-m68k.org" <schwab@linux-m68k.org>,
>         "47244@debbugs.gnu.org"
>  <47244@debbugs.gnu.org>
> Date: Mon, 29 Mar 2021 10:39:35 -0400
> 
> (gdb) p current_buffer->name_
> $4 = XIL(0x5555573519f4)
> (gdb) xstring
> $5 = (struct Lisp_String *) 0x5555573519f0
> " *nntpd*"

Any idea where could be the Lisp code that switches from " *nntpd*" to
the buffer in the currently selected window?  Perhaps some
with-current-buffer thing somewhere?

Since " *nntpd*" is probably a buffer where Gnus fetches articles, or
otherwise communicates with an NNTP server, does this per chance
happen in a separate thread in your session?  (AFAIR, Gnus can fetch
articles in a separate Lisp thread.)