bug#16207: 24.3.50; emacs_backtrace.txt

[Eli Zaretskii]

> Date: Sat, 21 Dec 2013 18:15:14 +0100
> From: martin rudalics <rudalics@gmx.at>
> Cc: 16207@debbugs.gnu.org
> 
>  > Breakpoint 1, terminate_due_to_signal (sig=22,
>  > backtrace_limit=2147483647) at emacs.c:351
>  > 351       signal (sig, SIG_DFL);
>  > (gdb) bt
>  > #0  terminate_due_to_signal (sig=22, backtrace_limit=2147483647) at 
> emacs.c:351
>  > #1  0x011615dc in die (msg=0x148b198 "BUFFERP (a)", file=0x148b10c
>  > "lisp.h", line=874) at alloc.c:6742
>  > #2  0x010eb7fb in XBUFFER (a=58132514) at lisp.h:874
>  > #3  0x01089e14 in run_window_configuration_change_hook (f=0x3aa1a08
>  > <__register_frame_info+61479432>) at window.c:3257
> ...
>  > "set-window-configuration" (0x88db28)
> 
> The selected window doesn't have a buffer.  I have no idea how to track
> this down.

Maybe one way is to think how could this happen, ever.  How can such
window even exist?