---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 1/10/13 1:18 AM
Description: Exception in server tick loop

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:806)
	at java.util.HashMap$KeyIterator.next(HashMap.java:841)
	at hz.a(EntityTracker.java:202)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:653)
	at hg.r(DedicatedServer.java:241)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:585)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:492)
	at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: FreeBSD (amd64) version 8.3-RELEASE-p4
- Java Version: 1.7.0_04, Oracle Corporation
- Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
- Memory: 386688056 bytes (368 MB) / 1410453504 bytes (1345 MB) up to 2134114304 bytes (2035 MB)
- JVM Flags: 8 total; -Xmn128M -Xms160M -Xmx2048M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts
- AABB Pool Size: 13423 (751688 bytes; 0 MB) allocated, 9716 (544096 bytes; 0 MB) used
- FML: ~ERROR~ NullPointerException: null
- Is Modded: Definitely; 'forge,fml'
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 20205 (1131480 bytes; 1 MB) allocated, 13883 (777448 bytes; 0 MB) used
- Player Count: 4 / 12; [ih['FledgeChangeling'/781405, l='ftb', x=106.25, y=89.00, z=-6.28], ih['LM17'/1321779, l='ftb', x=354.78, y=62.16, z=12442.06], ih['Wawaa'/1389620, l='ftb', x=-450.92, y=62.95, z=-9722.44], ih['BrandonBP'/1395940, l='ftb', x=-242.75, y=66.00, z=-1492.61]]
- World ftb Entities: 0 total; []
- World ftb Players: 0 total; []
- World ftb Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Dedicated Server