---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 10/31/18 12:17 PM
Description: Ticking entity

java.lang.ClassCastException: ahf cannot be cast to aoz$d
	at aoz$a.e(SourceFile:451)
	at aia.a(SourceFile:129)
	at agf.cQ(SourceFile:607)
	at age.k(SourceFile:2026)
	at agf.k(SourceFile:472)
	at age.S_(SourceFile:1877)
	at agf.S_(SourceFile:285)
	at aoz.S_(SourceFile:131)
	at afv.aJ(SourceFile:1688)
	at age.aJ(SourceFile:2167)
	at azt.a(SourceFile:1161)
	at ua.a(SourceFile:380)
	at azt.g(SourceFile:1144)
	at azt.a(SourceFile:1209)
	at ua.a(SourceFile:380)
	at azt.g(SourceFile:1144)
	at azt.n_(SourceFile:1026)
	at ua.n_(SourceFile:296)
	at net.minecraft.server.MinecraftServer.b(SourceFile:756)
	at net.minecraft.server.MinecraftServer.a(SourceFile:685)
	at dlv.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:573)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	at aoz$a.e(SourceFile:451)
	at aia.a(SourceFile:129)
	at agf.cQ(SourceFile:607)
	at age.k(SourceFile:2026)
	at agf.k(SourceFile:472)
	at age.S_(SourceFile:1877)
	at agf.S_(SourceFile:285)
	at aoz.S_(SourceFile:131)
	at afv.aJ(SourceFile:1688)
	at age.aJ(SourceFile:2167)
	at azt.a(SourceFile:1161)
	at ua.a(SourceFile:380)
	at azt.g(SourceFile:1144)
	at azt.a(SourceFile:1209)
	at ua.a(SourceFile:380)
	at azt.g(SourceFile:1144)

-- Entity being ticked --
Details:
	Entity Type: minecraft:cow (ala)
	Entity ID: 10
	Entity Name: Cow
	Entity's Exact location: 223.64, 50.00, 223.50
	Entity's Block location: World: (223,50,223), Chunk: (at 15,3,15 in 13,13; contains blocks 208,0,208 to 223,255,223), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Passengers: [aoz['Slime'/11, l='tryashtar's Command Land', x=223.64, y=51.05, z=223.50]]
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at azt.n_(SourceFile:1026)
	at ua.n_(SourceFile:296)

-- Affected level --
Details:
	Level name: tryashtar's Command Land
	All players: 1 total; [uc['tryashtar'/20, l='tryashtar's Command Land', x=216.25, y=50.00, z=219.27]]
	Chunk stats: ServerChunkCache: 3481
	Level seed: 1
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: {biome:"minecraft:plains",layers:[{block:"minecraft:bedrock",height:1},{block:"minecraft:cyan_terracotta",height:49}],structures:{}}
	Level spawn location: World: (128,50,128), Chunk: (at 0,3,0 in 8,8; contains blocks 128,0,128 to 143,255,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 12834976 game time, 6000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:756)
	at net.minecraft.server.MinecraftServer.a(SourceFile:685)
	at dlv.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:573)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 18w44a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 752456072 bytes (717 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 1 / 8; [uc['tryashtar'/20, l='tryashtar's Command Land', x=216.25, y=50.00, z=219.27]]
	Data Packs: vanilla, file/Tests (incompatible), file/DyeableEnderChests (incompatible), file/ExtendedPistons (incompatible), file/BlockManipulators (incompatible)
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.