bug#44502:

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 10 Aug 2022 16:26:38 +0300
> From: andrei.elkin--- via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Hello dear Colleagues!
> 
> For couple of times I hit a stack whose top part perfectly fits to the
> reported in this bug.
> Mine:
> gdb) bt
> #0  0x00007ffff256c817 in raise (sig=<optimized out>) at raise.c:51
> #1  0x0000555555732728 in terminate_due_to_signal (sig=6, backtrace_limit=2147483647) at emacs.c:437
> #2  0x00005555557e5e2e in die (msg=0x55555593c747 "EQ (window, selected_window)", file=0x55555593c4dc "window.c", line=557) at alloc.c:7486
> #3  0x000055555564f2cb in select_window (window=..., norecord=..., inhibit_point_swap=false) at window.c:557
> #4  0x000055555564f45b in Fselect_window (window=..., norecord=...) at window.c:634
> #5  0x00005555555f0389 in gui_consider_frame_title (frame=...) at xdisp.c:12801
> #6  0x00005555555f09be in prepare_menu_bars () at xdisp.c:12914

Please do:

 (gdb) frame 3
 (gdb) print window
 (gdb) xwindow
 (gdb) print XWINDOW(window)->contents
 (gdb) xbuffer
 (gdb) print selected_window
 (gdb) xwindow
 (gdb) print XWINDOW(selected_window)->contents
 (gdb) xbuffer

and post here everything GDB prints as result.

If GDB says it doesn't know about commands xwindow and xbuffer, you
need to do this:

 (gdb) source /path/to/emacs/src/.gdbinit

> My emacs version:
> 
> $ git log -1 --oneline 
> 7ffcba4213 

On which branch of the Git repository?

Thanks.