_cairo_path_fixed_fill_is_rectilinear logic is broken
script surface affected by issue in
_cairo_path_fixed_fill_is_rectilinear supposed to check if the path could be replaced by rectangle, and if the result of the given function is true - then
script-surface is called
but the logic doesn't check for the count of operations inside path buffer and its content
_emit_path_boxes accept only a valid structure of set of rectangles, if it fails it will skip entire path at all.