#0  cairo_set_dash (cr=0x0, dashes=0x1631a0, num_dashes=0, offset=0)
    at /build/buildd/cairo-1.8.8/src/cairo.c:1033
	status = <value optimized out>
#1  0x0015fd3c in cairogen_set_penstyle (job=<value optimized out>, cr=0x0)
    at gvrender_pango.c:235
	obj = (obj_state_t *) 0xa000b10
#2  0x0015ffdd in cairogen_polygon (job=0x90945d0, A=0xbf9f5640, n=4, 
    filled=1) at gvrender_pango.c:277
	obj = (obj_state_t *) 0xa000b10
	cr = (cairo_t *) 0x0
	i = <value optimized out>
#3  0x0019bfb8 in gvrender_polygon (job=0x90945d0, af=0xbf9f5640, n=4, 
    filled=<value optimized out>) at gvrender.c:812
	gvre = <value optimized out>
#4  0x0019c052 in gvrender_box (job=0x90945d0, B=
        {LL = {x = -4, y = -4}, UR = {x = 131463, y = 2586}}, 
    filled=<value optimized out>) at gvrender.c:851
	A = {{x = -4, y = -4}, {x = -4, y = 2586}, {x = 131463, y = 2586}, {
    x = 131463, y = -4}}
#5  0x001c4f46 in emit_background (job=0x90945d0, g=0x9098a48) at emit.c:787
	str = <value optimized out>
#6  0x001ca509 in emit_graph (job=0x90945d0, g=0x9098a48) at emit.c:2205
	n = <value optimized out>
	s = <value optimized out>
	flags = <value optimized out>
#7  0x001cc14b in gvRenderJobs (gvc=0x908c870, g=0x9098a48) at emit.c:2822
	prevjob = (GVJ_t *) 0x0
	job = <value optimized out>
	firstjob = <value optimized out>
#8  0x08048a12 in main (argc=5, argv=0xbf9f5a94) at dot.c:181
	prev = (graph_t *) 0x0