Unexpected error with default code

[michalkundrat]

File ultrafastLaneDetector.py", line 179, in process_output
    return np.array(lanes_points), np.array(lanes_detected)
ValueError: setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (4,) + inhomogeneous part.

I am getting this error, and I haven't even modified the code. Why is this happening? I am unable to fix it.

[harrybrown2019]

This is caused by the empty lane points [] in some narrow roads.

In the file: ultrafastLaneDetector.py

Change following line:
return np.array(lanes_points), np.array(lanes_detected)

To:
return lanes_points, lanes_detected