---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 5/25/13 5:57 PM
Description: Loading entity NBT

java.lang.UnsupportedOperationException: Cannot modify readonly attribute
	at oi.a(SourceFile:54)
	at sx.a(SourceFile:87)
	at sx.a(SourceFile:70)
	at np.a(SourceFile:348)
	at nq.a(SourceFile:251)
	at sz.a(SourceFile:297)
	at mx.f(SourceFile:1061)
	at aas.a(SourceFile:116)
	at aas.h(SourceFile:234)
	at bhe.a(SourceFile:22)
	at bfj.a(SourceFile:13)
	at bfj.a(SourceFile:7)
	at bfi.a(SourceFile:86)
	at bfi.a(SourceFile:13)
	at bes.a(SourceFile:205)
	at bhe.a(SourceFile:32)
	at bhe.a(SourceFile:17)
	at bhe.a(SourceFile:12)
	at bhj.a(SourceFile:106)
	at bhj.a(SourceFile:98)
	at bdt.a(SourceFile:317)
	at bdm.a(SourceFile:836)
	at bdm.b(SourceFile:682)
	at asx.R(SourceFile:674)
	at asx.d(SourceFile:607)
	at net.minecraft.client.main.Main.main(SourceFile:78)


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

-- Head --
Stacktrace:
	at oi.a(SourceFile:54)
	at sx.a(SourceFile:87)
	at sx.a(SourceFile:70)
	at np.a(SourceFile:348)
	at nq.a(SourceFile:251)
	at sz.a(SourceFile:297)

-- Entity being loaded --
Details:
	Entity Type: Skeleton (sz)
	Entity ID: 113
	Entity Name: Skeleton
	Entity's Exact location: 14.50, 73.50, -204.50
	Entity's Block location: World: (14,73,-205), Chunk: (at 14,4,3 in 0,-13; contains blocks 0,0,-208 to 15,255,-193), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
	at mx.f(SourceFile:1061)
	at aas.a(SourceFile:116)
	at aas.h(SourceFile:234)
	at bhe.a(SourceFile:22)
	at bfj.a(SourceFile:13)
	at bfj.a(SourceFile:7)
	at bfi.a(SourceFile:86)
	at bfi.a(SourceFile:13)

-- Entity being rendered --
Details:
	Entity Type: MinecartSpawner (sh)
	Entity ID: 112
	Entity Name: entity.MinecartSpawner.name
	Entity's Exact location: 0.54, -3.80, -8.55
	Entity's Block location: World: (0,-4,-9), Chunk: (at 0,-1,7 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Entity's Momentum: 0.00, 0.00, 0.00

-- Renderer details --
Details:
	Assigned renderer: bfj@436e5aed
	Location: 0.00,0.00,0.00 - World: (0,0,0), Chunk: (at 0,0,0 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)
	Rotation: 0.0
	Delta: 0.35128832
Stacktrace:
	at bes.a(SourceFile:205)
	at bhe.a(SourceFile:32)
	at bhe.a(SourceFile:17)
	at bhe.a(SourceFile:12)

-- Tile Entity Details --
Details:
	Name: MobSpawner // arm
	Block type: ID #52 (tile.mobSpawner // aol)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (13,64,-205), Chunk: (at 13,4,3 in 0,-13; contains blocks 0,0,-208 to 15,255,-193), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Actual block type: ID #52 (tile.mobSpawner // aol)
	Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
	at bhj.a(SourceFile:106)
	at bhj.a(SourceFile:98)
	at bdt.a(SourceFile:317)
	at bdm.a(SourceFile:836)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bbq['Tintento'/20, l='MpServer', x=12.46, y=68.15, z=-196.45]]
	Chunk stats: MultiplayerChunkCache: 60
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (1,4,-152), Chunk: (at 1,0,8 in 0,-10; contains blocks 0,0,-160 to 15,255,-145), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 356208 game time, 31372 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: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 17 total; [nn['entity.ItemFrame.name'/1, l='MpServer', x=-33.06, y=70.50, z=-147.50], nn['entity.ItemFrame.name'/2, l='MpServer', x=-35.94, y=70.50, z=-147.50], tg['Villager'/5, l='MpServer', x=-30.50, y=64.00, z=-164.50], sz['Stalfos'/6, l='MpServer', x=-11.50, y=64.00, z=-191.50], rg['Pig'/7, l='MpServer', x=-2.41, y=71.01, z=-147.22], qy['Chicken'/8, l='MpServer', x=-2.38, y=72.09, z=-147.19], sh['entity.MinecartSpawner.name'/9, l='MpServer', x=13.50, y=65.69, z=-204.50], sh['entity.MinecartSpawner.name'/10, l='MpServer', x=23.50, y=65.69, z=-204.50], rg['Pig'/11, l='MpServer', x=62.19, y=64.00, z=-230.84], rg['Pig'/12, l='MpServer', x=60.47, y=64.00, z=-209.25], qz['Cow'/13, l='MpServer', x=61.38, y=64.00, z=-217.50], rg['Pig'/14, l='MpServer', x=63.19, y=64.00, z=-212.66], qz['Cow'/15, l='MpServer', x=71.13, y=64.00, z=-219.13], qz['Cow'/17, l='MpServer', x=74.31, y=64.00, z=-205.25], rg['Pig'/16, l='MpServer', x=69.28, y=64.00, z=-212.66], no['entity.LeashKnot.name'/19, l='MpServer', x=-2.50, y=78.50, z=-147.50], bbq['Tintento'/20, l='MpServer', x=12.46, y=68.15, z=-196.45]]
	Retry entities: 0 total; []
Stacktrace:
	at bbn.a(SourceFile:282)
	at asx.b(SourceFile:1793)
	at asx.d(SourceFile:616)
	at net.minecraft.client.main.Main.main(SourceFile:78)

-- System Details --
Details:
	Minecraft Version: 13w21a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_05, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 275297888 bytes (262 MB) / 536543232 bytes (511 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 9251 (518056 bytes; 0 MB) allocated, 631 (35336 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2817, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 200 (11200 bytes; 0 MB) allocated, 93 (5208 bytes; 0 MB) used