Compost Tumbler- Grubs!!

So I have been feeding my compost tumbler and it seems to be doing pretty well. Things are turning brown and the volume has decreased and it doesn't smell too bad.  My only concern is that I have grub/maggot things in there.  They seem to be going to town on my corn cobs and my general feel from my internet searching is that they are good for the compost bin.  My only concern is putting them in the garden. Will they eat my plants/roots?  I am hoping them will die/go away before the compost is ready but if they don't is it OK to put maggot-y compost in the garden?