Minecraft crashes on ticking the bookshelf golem. Logs attached.
latest.log
debug.log

I'll look into this. For now disable villager-summoned golems in the config (set villager_summon_chance to 0)

Looks like I messed up with the default configs. Notice that all the entries in villager_summon_golems are in the format golems:golems:bookshelf or whatever? Remove the extra golems: and you should be fine. I'll check why the config was set up to default to that.