error

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 17/08/16 19:00
Description: Unexpected error

java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
	at java.util.ArrayList$Itr.next(ArrayList.java:851)
	at net.friwi.client.gui.util.ColorFaders.onTick(ColorFaders.java:8)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1987)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1265)
	at net.minecraft.client.Minecraft.run(Minecraft.java:457)
	at net.minecraft.client.main.Main1.main(Main1.java:122)
	at net.minecraft.client.main.Main.main(Main.java:22)


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

-- Head --
Stacktrace:
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
	at java.util.ArrayList$Itr.next(ArrayList.java:851)
	at net.friwi.client.gui.util.ColorFaders.onTick(ColorFaders.java:8)

-- Affected level --
Details:
	Level name: MpServer
	All players: 4 total; [EntityPlayerSP['Cr4c'/3663102, l='MpServer', x=-1206.74, y=134.81, z=-7050.66], EntityOtherPlayerMP['ImPole'/3490862, l='MpServer', x=-1213.66, y=133.00, z=-7051.69], EntityOtherPlayerMP['Lulle'/3272248, l='MpServer', x=-1210.75, y=133.00, z=-7045.66], EntityOtherPlayerMP['Melon_HD'/19765, l='MpServer', x=-1210.63, y=118.51, z=-7058.45]]
	Chunk stats: MultiplayerChunkCache: 70, 70
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: 0.00,55.00,0.00 - World: (0,55,0), Chunk: (at 0,3,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 7391728 game time, 174352 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: Blocked
	Retry entities: Blocked
	Server brand: EthyronSpigot
	Server type: Non-integrated multiplayer server
Stacktrace:
	at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:393)
	at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:3001)
	at net.minecraft.client.Minecraft.run(Minecraft.java:486)
	at net.minecraft.client.main.Main1.main(Main1.java:122)
	at net.minecraft.client.main.Main.main(Main.java:22)

-- System Details --
Details:
	Minecraft Version: 1.8
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 2500387168 bytes (2384 MB) / 3120037888 bytes (2975 MB) up to 3120037888 bytes (2975 MB)
	JVM Flags: 5 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -Xms3G -Xmx3072M -Xmx3072M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: Ethyron
	LWJGL: 2.9.4
	OpenGL: GeForce GT 630M/PCIe/SSE2 GL version 4.5.0 NVIDIA 364.72, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Deutsch (Deutschland)
	Profiler Position: N/A (disabled)