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: Tue, 23 Mar 2021 11:08:36 -0400
> 
> >> #0  0x00005555555e1b6d in redisplay_internal ()
> >>     at ../../master/src/xdisp.c:15789
> >
> > I don't understand: the breakpoint was supposed to be on line 1840 in
> > buffer.c, so why does frame #0 show line 15789 in xdisp.c?  What am I
> > missing here?  Is this the right backtrace?
> 
> My mistake.  It was a segfault.  The breakpoint did not trigger.  Here's
> the breakpoint in question:
> 
> 5       breakpoint     keep y   0x0000555555713580 in Fkill_buffer 
>                                                    at 
> ../../master/src/buffer.c:1840 inf 1, 2
>         stop only if redisplaying_p != 0 && b->window_count > 0

Then I guess the hypothesis about the scenario which causes the crash
was wrong.  Let's see if Martin's suggestion has better luck.