Free Throw/Double Violation?

[OK Ref]

When shooting a 1&1, A2 violates b/f shot. Shooter shoots
and does not hit nothing but air. Does the lane violation
immediately cancel the shot action and throw in by team B?

I had someone tell me this was a double violation and the
call goes to the AP? Any responses please provide rules
or case situation. I could not find anything to address this issue.