Minecraft Forums

Hi, so I'm playing the latest snapshot and my game keeps crashing when I load it. I know why because I read the crash report. Something to do with the new drowned mob. I spent a lot of time on this world... is there a way to fix this? I'd hate to lose it.

Report:

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 3/26/18 8:35 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
at adb.a(SourceFile:41)
at acz.a(SourceFile:22)
at adl.a(SourceFile:94)
at abw.cL(SourceFile:644)
at abv.l(SourceFile:1895)
at abw.l(SourceFile:504)
at ajs.l(SourceFile:33)
at aki.l(SourceFile:257)
at abv.S_(SourceFile:1750)
at abw.S_(SourceFile:284)
at ajs.S_(SourceFile:38)
at aki.S_(SourceFile:232)
at ajg.S_(SourceFile:252)
at aug.a(SourceFile:1617)
at se.a(SourceFile:705)
at aug.h(SourceFile:1593)
at aug.p_(SourceFile:1475)
at se.p_(SourceFile:538)
at net.minecraft.server.MinecraftServer.w(SourceFile:702)
at net.minecraft.server.MinecraftServer.v(SourceFile:627)
at czd.v(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:532)
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 adb.a(SourceFile:41)
at acz.a(SourceFile:22)
at adl.a(SourceFile:94)
at abw.cL(SourceFile:644)
at abv.l(SourceFile:1895)
at abw.l(SourceFile:504)
at ajs.l(SourceFile:33)
at aki.l(SourceFile:257)
at abv.S_(SourceFile:1750)
at abw.S_(SourceFile:284)
at ajs.S_(SourceFile:38)
at aki.S_(SourceFile:232)
at ajg.S_(SourceFile:252)
at aug.a(SourceFile:1617)
at se.a(SourceFile:705)
at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
Entity Type: minecraft:drowned (ajg)
Entity ID: 1190
Entity Name: Drowned
Entity's Exact location: -97.30, 60.99, -1985.71
Entity's Block location: World: (-98,60,-1986), Chunk: (at 14,3,14 in -7,-125; contains blocks -112,0,-2000 to -97,255,-1985), Region: (-1,-4; contains chunks -32,-128 to -1,-97, blocks -512,0,-2048 to -1,255,-1537)
Entity's Momentum: 0.00, 0.00, 0.01
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at aug.p_(SourceFile:1475)
at se.p_(SourceFile:538)

-- Affected level --
Details:
Level name: Simplicity
All players: 1 total; [sg['Grippy_'/842, l='Simplicity', x=-170.87, y=64.85, z=-2061.30]]
Chunk stats: ServerChunkCache: 452 Drop: 0
Level seed: 5648628648980911030
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (-26,64,-6), Chunk: (at 6,4,10 in -2,-1; contains blocks -32,0,-16 to -17,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 367715 game time, 424915 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 110351 (now: false), thunder time: 3754 (now: true)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.w(SourceFile:702)
at net.minecraft.server.MinecraftServer.v(SourceFile:627)
at czd.v(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:532)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 18w11a
Operating System: Mac OS X (x86_64) version 10.13.3
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 649340176 bytes (619 MB) / 939524096 bytes (896 MB) up to 4294967296 bytes (4096 MB)
JVM Flags: 7 total; -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [sg['Grippy_'/842, l='Simplicity', x=-170.87, y=64.85, z=-2061.30]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

If you don't want to lose a world, don't play snapshots. You've been warned to make backups before selecting a snapshot.

This doesn't help me though!!! Are you getting at there is no way to fix this?! ;(