bug#7348: 23.2.50; Emacs crashes on fast window resize with scrollbars on under OSX

[Jan Djärv]

Some timing has changed.  I got a crash because of BadCursor.  It only happens 
if you start Emacs and put the mouse fast within the frame on a non-toolkit 
build.  Initializing cursor to No_Cursor in note_mode_line_or_margin_highlight 
fixed tha.

        Jan D.


YAMAMOTO Mitsuharu skrev 2010-11-07 04.18:
> > > > > > On Sat, 6 Nov 2010 21:20:03 +0000, Jakub Turski<yacoob@gmail.com>  said:
>
> > Method to replicate:
> > 1/ Compile recent OSX Emacs from 'emacs-23' branch
> > 2/ Launch 'emacs -Q'
> > 3/ Press: C-x 2
> > 4/ Move your mouse to the corner of the frame, grab it, drag up,
> > rescaling the vertically to minimum size
>
> I tried this recipe with the *GTK+ build* compiled with
> --enable-checking on Mac OS X 10.6.4, and I got the following
> assertion failure:
>
> .../src/xdisp.c:11515: Emacs fatal error: assertion failed: BUFFERP(w->buffer)
>
> 11511     /* If showing the region, and mark has changed, we must redisplay
> 11512        the whole window.  The assignment to this_line_start_pos prevents
> 11513        the optimization directly below this if-statement.  */
> 11514     if (((!NILP (Vtransient_mark_mode)
> 11515           &&  !NILP (XBUFFER (w->buffer)->mark_active))
> 11516          != !NILP (w->region_showing))
> 11517         || (!NILP (w->region_showing)
> 11518           &&  !EQ (w->region_showing,
>
> The value of w->buffer was nil when the assertion failure occurred.
>
>                                      YAMAMOTO Mitsuharu
>                                 mituharu@math.s.chiba-u.ac.jp