Fix message type to string crash (#4308)
Fix message type to string crash (#4308)

* Fix message string crash

* Fix

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