---- Minecraft Crash Report ----
// There are four lights!

Time: 9/2/15 9:07 AM
Description: Ticking entity

java.lang.IllegalArgumentException: Modifier is already applied on this attribute!
	at ry.b(SourceFile:89)
	at xx.c(SourceFile:123)
	at ul.b(SourceFile:82)
	at xx$b.b(SourceFile:430)
	at su.a(SourceFile:135)
	at su.a(SourceFile:107)
	at rl.bT(SourceFile:547)
	at rk.n(SourceFile:1602)
	at rl.n(SourceFile:404)
	at ye.n(SourceFile:33)
	at xx.n(SourceFile:211)
	at rk.m(SourceFile:1470)
	at rl.m(SourceFile:243)
	at ye.m(SourceFile:38)
	at agq.a(SourceFile:1436)
	at ll.a(SourceFile:661)
	at agq.g(SourceFile:1414)
	at agq.k(SourceFile:1305)
	at ll.k(SourceFile:540)
	at net.minecraft.server.MinecraftServer.D(SourceFile:625)
	at net.minecraft.server.MinecraftServer.C(SourceFile:553)
	at bvd.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:457)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Stacktrace:
	at ry.b(SourceFile:89)
	at xx.c(SourceFile:123)
	at ul.b(SourceFile:82)
	at xx$b.b(SourceFile:430)
	at su.a(SourceFile:135)
	at su.a(SourceFile:107)
	at rl.bT(SourceFile:547)
	at rk.n(SourceFile:1602)
	at rl.n(SourceFile:404)
	at ye.n(SourceFile:33)
	at xx.n(SourceFile:211)
	at rk.m(SourceFile:1470)
	at rl.m(SourceFile:243)
	at ye.m(SourceFile:38)
	at agq.a(SourceFile:1436)
	at ll.a(SourceFile:661)
	at agq.g(SourceFile:1414)

-- Entity being ticked --
Details:
	Entity Type: Enderman (xx)
	Entity ID: 112174
	Entity Name: Enderman
	Entity's Exact location: 978.45, 4.00, 670.17
	Entity's Block location: 978.00,4.00,670.00 - World: (978,4,670), Chunk: (at 2,0,14 in 61,41; contains blocks 976,0,656 to 991,255,671), Region: (1,1; contains chunks 32,32 to 63,63, blocks 512,0,512 to 1023,255,1023)
	Entity's Momentum: 0.00, -0.08, 0.01
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at agq.k(SourceFile:1305)
	at ll.k(SourceFile:540)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [ln['James9270'/19, l='New World', x=995.07, y=4.00, z=673.88]]
	Chunk stats: ServerChunkCache: 625 Drop: 0
	Level seed: 2125020300
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: 976.00,4.00,697.00 - World: (976,4,697), Chunk: (at 0,0,9 in 61,43; contains blocks 976,0,688 to 991,255,703), Region: (1,1; contains chunks 32,32 to 63,63, blocks 512,0,512 to 1023,255,1023)
	Level time: 1284 game time, 16000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 131508 (now: false), thunder time: 117632 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:625)
	at net.minecraft.server.MinecraftServer.C(SourceFile:553)
	at bvd.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:457)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 15w36b
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 173780944 bytes (165 MB) / 700448768 bytes (668 MB) up to 3817865216 bytes (3641 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ln['James9270'/19, l='New World', x=995.07, y=4.00, z=673.88]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.