bug#14062: 24.3.50; emacs_backtrace.txt

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 22 Apr 2013 18:12:13 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, martin rudalics <rudalics@gmx.at>, 
> 14062@debbugs.gnu.org
> 
> ??
> ??:0
> w32_backtrace at w32fns.c:7687
> emacs_abort at w32fns.c:7719
> terminate_due_to_signal at emacs.c:343
> die at alloc.c:6522
> w32_wnd_proc at w32fns.c:3127

Thanks!  the trap worked again!  This is here:

  #ifdef ENABLE_CHECKING
            /* Temporary code to catch crashes in computing form.rcArea.top.  */
            eassert (FRAMEP (w->frame));
            eassert (BUFFERP (w->contents));  <<<<<<<<<<<<<<<<<<<<<<<<

So the cause for the assertion violation is now crystal clear, and I
will commit a work-around soon.  (I still don't understand how such a
window ended up here, and why didn't the BUFFERP test in
WINDOW_WANTS_HEADER_LINE_P catch the problem before XBUFFER aborted.)