Improve formatting of error messages. (#154)
Improve formatting of error messages. (#154)

* Improve formatting of error messages.

* Catch errors that occur when looking up function name from function ID.

* Push warning to user if worker spends to long waiting for proper import counter.

* Fixes.

* Add comment.

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