Moderator Note
Worlds newly generated in 1.16 Pre-release 1 are corrupted beyond simple repair. The part of the level.dat file that stores dimensions has gone missing, meaning that these worlds do not have a Nether or End. @unknown has a full explanation in this Pre-release 2 video here, along with some potential ways on how to fix it - though we thoroughly recommend to instead just discard the world.
Built a portal, game crashed before loading Nether.
Stack trace
1.16-pre1\: [^crash-2020-06-04_16.23.07-server.txt]
Description: Ticking player
java.lang.NullPointerException: Ticking player
at ze.a(SourceFile:651)
at aoj.bg(SourceFile:1900)
at aoj.ad(SourceFile:437)
at aov.ad(SourceFile:320)
at aoj.j(SourceFile:419)
at aov.j(SourceFile:2181)
at bdy.j(SourceFile:275)
at ze.w_(SourceFile:418)
at zv.b(SourceFile:206)
at me.a(SourceFile:234)
at zu.c(SourceFile:171)
at net.minecraft.server.MinecraftServer.b(SourceFile:885)
at net.minecraft.server.MinecraftServer.a(SourceFile:812)
at eov.a(SourceFile:93)
at net.minecraft.server.MinecraftServer.v(SourceFile:671)
at net.minecraft.server.MinecraftServer.a(SourceFile:256)
at java.lang.Thread.run(Thread.java:745)Linked issues
is duplicated by 28
Attachments
Comments 9
I Tried To Reproduce This Glitch By Creating New Worlds, However The Nether Would ALWAYS Spawn In And The Game Would Not Crash
Creating a new world and then relogging before going to the Nether triggers the crash. Going to the Nether in a fresh world without relogging first works. Looks like dimensions are not saved or loaded correctly.
No custom settings or data packs installed. Completely fresh hardcore world. There were some generation errors within the world as well - i.e. biomes cut off along chunks and such.
Could it be related to MC-187358?
I found two possible solutions to this issue.
Option 1 (easier):
I simply created a new world with the same seed as the corrupted world. I then moved the level.dat from the newly created world's save folder to the corrupted world's save folder overwriting the data. This allowed me to enter the nether with no problem.
As far as I am aware of this should not change any blocks. It does however delete all items in your inventory, so you should place them in a chest before attempting this method. It's also worth mentioning that this method transfers gamerules, difficulty, time, gamemode, and some other information, so make sure your newly created world has the same world options as the corrupted one.
This wiki contains exactly what data transferred.
Option 2 (better option, requires NBT editing):
Create a new world with the same seed as the corrupted world. Transfer the NBT data from "Data.WorldGenSettings.dimensions" in the newly created world's level.dat to the corrupted world's level.dat.
This method will not change anything except dimensions.
Make backups!
Did you use any special custom world gen settings? If so, please attach them to this ticket.