#0  0x00007f606cc9f009 in vnc_framebuffer_get_width (fb=0x0)
    at vncframebuffer.c:29
No locals.
#1  0x00007f606cec4304 in motion_event (widget=0x114ee10, motion=0x1111a30)
    at vncdisplay.c:594
	priv = (VncDisplayPrivate *) 0x114ee80
	ww = <value optimized out>
	wh = <value optimized out>
	fbw = <value optimized out>
	fbh = <value optimized out>
#2  0x00007f6075b91943 in _gtk_marshal_BOOLEAN__BOXED (closure=0xf9e880, 
    return_value=0x7fffe6dc5a90, n_param_values=<value optimized out>, 
    param_values=0x138a290, invocation_hint=<value optimized out>, 
    marshal_data=<value optimized out>)
    at /build/buildd/gtk+2.0-2.23.2/gtk/gtkmarshalers.c:71
	callback = (GMarshalFunc_BOOLEAN__BOXED) 0x7f606cec4270 <motion_event>
	cc = (GCClosure *) 0xf9e880
	data1 = (gpointer) 0x114ee10
	data2 = (gpointer) 0x100a2c0
	v_return = <value optimized out>
	__PRETTY_FUNCTION__ = "_gtk_marshal_BOOLEAN__BOXED"
#3  0x0000000000008002 in ?? ()
No symbol table info available.
#4  0x0000000000f9e880 in ?? ()
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.