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---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 9/27/13 8:30 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/world/chunk/EmptyChunk
at net.minecraft.world.WorldServer.func_72970_h(WorldServer.java:730)
at net.minecraft.world.World.<init>(World.java:291)
at net.minecraft.world.WorldServer.<init>(WorldServer.java:112)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:74)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:107)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
Caused by: java.lang.ClassNotFoundException: net.minecraft.world.chunk.EmptyChunk
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
Caused by: java.lang.NullPointerException
at net.aetherteam.threadedlighting.asm.TLTransformer.transform(TLTransformer.java:103)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:274)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:172)
... 9 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1540843664 bytes (1469 MB) / 2225209344 bytes (2122 MB) up to 3817799680 bytes (3640 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v8.11 FML v6.4.18.898 Minecraft Forge 9.11.0.898 8 mods loaded, 8 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FML{6.4.18.898} [Forge Mod Loader] (minecraftforge-9.11.0.898.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forge{9.11.0.898} [Minecraft Forge] (minecraftforge-9.11.0.898.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
playercoreapi{0.1} [PlayerCoreAPI] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
shadersmod{2.0.1 beta 17} [GLSL Shaders Mod] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
threadedlighting{0.1} [Threaded Lighting] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BetterGrassAndLeavesMod{1.6.4.A} [Better Grass & Leaves Mod] (BetterGrassAndLeavesMod[v1.6.4.A].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BiomesOPlenty{1.1.2} [Biomes O' Plenty] (BiomesOPlenty-universal-1.6.4-1.1.2.51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Profiler Position: N/A (disabled)
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'