Villagers summoned or modified to have a brain tag with positions that don't correspond to real village coordinates will cause the game to either immediately crash, or crash after the villager dies to natural means. This is due to the game being unable to locate that position as it was never registered to a village. Additionally, attempting to kill these villagers will result in an `Unexpected error` in the chat.

Crash details: The game crashed whilst ticking entity
Error: java.lang.IllegalStateException: POI never registered at eu

To Reproduce:

/summon minecraft:villager ~ ~ ~ {Brain:{memories:{"minecraft:home":{pos:[I;1000,100,1000],dimension:"minecraft:overworld"}}}}
This villager when spawned will cause the game to crash after natural means. This includes: dying to lava, dying to water, dying to zombies, etc., but does not include killing by punching by the player.

/summon minecraft:villager ~ ~ ~ {Brain:{memories:{"minecraft:home":{pos:[I;1000,100,1000],dimension:"minecraft:overworld"}}}}
This causes an immediate game crash

/summon minecraft:villager ~ ~ ~ {Brain:{memories:{"minecraft:home":{pos:[I;1000,100,1000],dimension:"minecraft:overworld"}}}}
This also causes an immediate game crash