I also had the same problem opening a world created in previous snapshot versions. It usually opens the 1st time in Pre 1, but the second time the crash occurs. It seems that the crash is always related to the villager entity in certain chunks created in previous versions of snapshots. If you drop a villager with an egg in the creative mode in these chunks, the crash also occurs instantly. As in the logs posted here, the villager entity is always referred in these errors.
Entity being ticked - Details: Entity Type: minecraft: villager (bird) Entity ID: 222 Entity Name: Dorfbewohner Entity's Exact location: -756.53, 66.00, -852.33 Entity's Block location: World: (-757,66, -853), Chunk: (at 11.4,11 in -48, -54; contains blocks -768,0, -864 to -753,255, -849), Region : (-2.2, contains chunks -64, -64 to -33, -33, blocks -1024.0, -1024 to -513.255, -513)
By deleting the villager entity mentioned in the logs with nbtexplorer it is possible to enter the world without the crash, but some chunks are lost.
Claudio Dionisi
Confirmed for Pre Release 1
I also had the same problem opening a world created in previous snapshot versions. It usually opens the 1st time in Pre 1, but the second time the crash occurs. It seems that the crash is always related to the villager entity in certain chunks created in previous versions of snapshots. If you drop a villager with an egg in the creative mode in these chunks, the crash also occurs instantly. As in the logs posted here, the villager entity is always referred in these errors.
Entity being ticked -
Details:
Entity Type: minecraft: villager (bird)
Entity ID: 222
Entity Name: Dorfbewohner
Entity's Exact location: -756.53, 66.00, -852.33
Entity's Block location: World: (-757,66, -853), Chunk: (at 11.4,11 in -48, -54; contains blocks -768,0, -864 to -753,255, -849), Region : (-2.2, contains chunks -64, -64 to -33, -33, blocks -1024.0, -1024 to -513.255, -513)
By deleting the villager entity mentioned in the logs with nbtexplorer it is possible to enter the world without the crash, but some chunks are lost.