Game Crash when creating Superflat world (Void), entering the End, or creating floating islands buffet world

Recreated. It happens when creating and loading a void superflat in 1.13-pre9, and loading a void superflat created in 1.13-pre8 and 1.13-pre7 in 1.13-pre9.

Crashes entire server when entering the end, also 1.13-pre9

It also happens when entering a floating island Buffet world in 1.13-pre9

Seems to crash when a player goes under the world limit (Y=0) here. The world crashes permanently, even if the player that caused this to trigger is no longer there.

^{EDIT: Maybe the game is trying to spawn mobs on subchunk -1?}

Also crashes on MAC OSX when I just up-convert any world (That has been edited and not just completely new) form PRE 8 to PRE 9 (Mob spawning was disabled and there were nob mobs but there were armor stands)....

this also happends to me when i enter any world that is pre pre-9 or creating a new world

Hit this issue on my snapshot server too, Crashes when someone enters the end. rolled back to pre-8 no problems found.

Also happened in my world that i've been updating forward since 1.12. I played it perfectly this morning in 1.19 but after saving the game it will no longer open. I attempted to patch it by replacing the level.dat files which did give me access to the server until it crashed again once it loaded a specific chunk at spawn. I'm glad to see it's not only me and hopeful my world isn't corrupted. 

Making a copy of this world, I loaded it in pre-release 8 and the world runs fine now. Definantly a bug in pre-release 9.

Can confirm same "Exception ticking world" error happens with a fresh, regularly generated world in the pre-9 snapshot. If you enter The End, the world loads for a second and then the game crashes.

---- Minecraft Crash Report ----
// Who set us up the TNT?Time: 17/07/18 07:18
Description: Exception ticking world
java.lang.IllegalArgumentException: bound must be positive
	at java.util.Random.nextInt(Unknown Source)
	at axz.a(SourceFile:196)
	at axz.a(SourceFile:98)
	at tc.i_(SourceFile:196)
	at net.minecraft.server.MinecraftServer.w(SourceFile:690)
	at net.minecraft.server.MinecraftServer.v(SourceFile:623)
	at dft.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
----------------------------------------------------------------------------------------- Head --
Thread: Server thread
Stacktrace:
	at java.util.Random.nextInt(Unknown Source)
	at axz.a(SourceFile:196)
	at axz.a(SourceFile:98)
	at tc.i_(SourceFile:196)-- Affected level --
Details:
	Level name: End crash?
	All players: 1 total; [te['voodoobeard'/165, l='End crash?', x=100.00, y=49.00, z=0.00]]
	Chunk stats: ServerChunkCache: 27 Drop: 0
	Level seed: 5526084796321833583
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: {}
	Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:690)
	at net.minecraft.server.MinecraftServer.v(SourceFile:623)
	at dft.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)-- System Details --
Details:
	Minecraft Version: 1.13-pre9
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_171, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 506299752 bytes (482 MB) / 1033895936 bytes (986 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [te['voodoobeard'/165, l='End crash?', x=100.00, y=49.00, z=0.00]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

To reproduce:

  1. Generate new world
  2. Enter the End

Getting the same problem here. In pre-8, I went through a nether portal to the overworld, and it crashed. It reopened fine, then some time later the same thing happened, nether to overworld, crash. When I was returned to the launcher pre-9 was available, so I downloaded that and reopened the world, assuming it would be fine like last time, but now that world crashes upon opening. I tried the solution proposed by HurricanKai, but turning mobSpawning to false didn't work.

@Alfie: It's fixed for the next version.

Alfie you're not describing this ticket.