fix problem if old version of arrow is cloned (#538)
fix problem if old version of arrow is cloned (#538)


atumanov/ray,robertnishihara/ray,ujvl/ray-ng,richardliaw/ray,ujvl/ray-ng,pcmoritz/ray-1,robertnishihara/ray,atumanov/ray,Wapaul1/ray,alanamarzoev/ray,ray-project/ray,ray-project/ray,robertnishihara/ray,robertnishihara/ray,alanamarzoev/ray,pcmoritz/ray-1,robertnishihara/ray,ray-project/ray,ujvl/ray-ng,richardliaw/ray,stephanie-wang/ray,atumanov/ray,pcmoritz/ray-1,robertnishihara/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,stephanie-wang/ray,Wapaul1/ray,ray-project/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,stephanie-wang/ray,Wapaul1/ray,stephanie-wang/ray,atumanov/ray,atumanov/ray,richardliaw/ray,stephanie-wang/ray,alanamarzoev/ray,alanamarzoev/ray,alanamarzoev/ray,robertnishihara/ray,Wapaul1/ray,richardliaw/ray,robertnishihara/ray,pcmoritz/ray-1,stephanie-wang/ray,Wapaul1/ray,ujvl/ray-ng,atumanov/ray,Wapaul1/ray,richardliaw/ray,stephanie-wang/ray,alanamarzoev/ray,robertnishihara/ray,pcmoritz/ray-1,atumanov/ray,richardliaw/ray,stephanie-wang/ray,ray-project/ray,stephanie-wang/ray,pcmoritz/ray-1,richardliaw/ray,atumanov/ray