Free throw violation

[cmhjordan23]

So I've it several times and trying to figure out how you enforce the following.
On second free throw on front end of bonus, opponent commits lane violation, free throw never hits rim. Do we have a double violation and go to AP arrow or is there no free throw violation? Does it need to hit the rim or go through the net to end. I am guessing double violation here. I have heard it both ways.