Comment 2 for bug 1423039

StacktraceTop:
 rsvg_filter_primitive_specular_lighting_render (self=0x7f61f4047fa0, ctx=0x4) at rsvg-filter.c:4371
 _cairo_path_fixed_move_to (path=0x3ff0000000000000, x=0, y=0) at /build/buildd/cairo-1.13.0~20140204/src/cairo-path-fixed.c:404
 cairo_set_source_rgba (cr=0x7f61fc022980, red=<optimized out>, green=<optimized out>, blue=<optimized out>, alpha=<optimized out>) at /build/buildd/cairo-1.13.0~20140204/src/cairo.c:720
 rsvg_cairo_render_path (ctx=0x7f61f401e110, path=<optimized out>) at rsvg-cairo-draw.c:504
 ?? ()