I couldn't find this bug when testing yet. v1.09 is up. I hope this version will print one more line in the error message, saying which file the error happened in. Old saves should work between these two versions, you should just copy the folder www/save
after upgrading, I'm able to kill all the rats and all the deer without any issues. There's only one deer that seems to respawn when I leave Ravage, though. No rats have respawned. Edit: I take it back. After getting 4 deer meats, there are no deer spawning.
Edit again: I had one deer respawn. Maybe it's random, the respawn rate?