class RuboCop::Cop::Rails::Exit

def right_receiver?(receiver_node)

`Process`, or if receiver node is nil for plain `exit` calls.
Only register if exit is being called explicitly on `Kernel`, 
def right_receiver?(receiver_node)
  return true unless receiver_node
  _a, receiver_node_class, _c = *receiver_node
  EXPLICIT_RECEIVERS.include?(receiver_node_class)
end