---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 7/31/14 9:19 AM
Description: Exception in server tick loop

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
	at java.util.HashMap$KeyIterator.next(HashMap.java:828)
	at qi.a(SourceFile:163)
	at net.minecraft.server.MinecraftServer.y(SourceFile:614)
	at pk.y(SourceFile:303)
	at net.minecraft.server.MinecraftServer.x(SourceFile:530)
	at net.minecraft.server.MinecraftServer.run(SourceFile:446)
	at java.lang.Thread.run(Thread.java:662)


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: 14w31a
	Operating System: Linux (i386) version 2.6.32-5-686-bigmem
	Java Version: 1.6.0_26, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 263945416 bytes (251 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -Xmx512M -Xms512M
	IntCache: cache: 8, tcache: 93, allocated: 4, tallocated: 5
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [qr['CygnusAtratusUA'/162066, l='world', x=132.55, y=5.00, z=247.32]]
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)