Minecraft Forums

Whenever I try to access my single player world that I have been editing using mcedit, it will randomly crash on me. It's to the point where I can't even open the world without the whole launcher restarting. Here is the crash log if it helps:



---- Minecraft Crash Report ----
// Why is it breaking

Time: 7/11/14 5:44 PM
Description: Exception ticking world

java.lang.IllegalArgumentException: n must be positive
at java.util.Random.nextInt(Unknown Source)
at ahz.a(SourceFile:122)
at ahz.a(SourceFile:27)
at aht.a(SourceFile:364)
at aie.a(SourceFile:138)
at aqy.a(SourceFile:432)
at mr.a(SourceFile:166)
at apw.a(SourceFile:772)
at mr.c(SourceFile:101)
at mr.d(SourceFile:114)
at aha.e(SourceFile:310)
at ahn.a(SourceFile:21)
at ahn.a(SourceFile:77)
at ms.b(SourceFile:117)
at net.minecraft.server.MinecraftServer.v(SourceFile:514)
at net.minecraft.server.MinecraftServer.u(SourceFile:453)
at bvj.u(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:369)
at li.run(SourceFile:628)


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

-- Head --
Stacktrace:
at java.util.Random.nextInt(Unknown Source)
at ahz.a(SourceFile:122)
at ahz.a(SourceFile:27)
at aht.a(SourceFile:364)
at aie.a(SourceFile:138)
at aqy.a(SourceFile:432)
at mr.a(SourceFile:166)
at apw.a(SourceFile:772)
at mr.c(SourceFile:101)
at mr.d(SourceFile:114)
at aha.e(SourceFile:310)
at ahn.a(SourceFile:21)
at ahn.a(SourceFile:77)
at ms.b(SourceFile:117)

-- Affected level --
Details:
Level name: Horizon
All players: 1 total; [mv['Ultamos95'/414, l='Horizon', x=-401.56, y=70.70, z=350.26]]
Chunk stats: ServerChunkCache: 732 Drop: 315
Level seed: -243695824
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (62,64,184), Chunk: (at 14,4,8 in 3,11; contains blocks 48,0,176 to 63,255,191), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 43314 game time, 44281 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 47373 (now: false), thunder time: 14296 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.v(SourceFile:514)
at net.minecraft.server.MinecraftServer.u(SourceFile:453)
at bvj.u(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:369)
at li.run(SourceFile:628)

-- System Details --
Details:
Minecraft Version: 1.7.9
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 153408072 bytes (146 MB) / 368050176 bytes (351 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [mv['Ultamos95'/414, l='Horizon', x=-401.56, y=70.70, z=350.26]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.



Can anyone help me or tell me what's going on and how I can fix it?

I tried restarting but it's more than that, I can only occasionally open the world and it gets as far as "Downloading Terrain" before it closes the whole launcher and shows the crash report. Someone on another forum had a suggestion that perhaps some vines or growth of something has formed at y= -1 but I doubt that, just putting that out there in case that may help come closer to an answer

It's a bad spawn chunk. Not sure how to fix it whenever the world automatically crahses, but I'm pretty sure that's what it is.

If that's true, can someone tell me how to fix a bad spawn chunk or is the world just pretty much ruined?