---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 08:00 06/11/15
Description: Ticking entity

java.lang.ClassCastException: ahw cannot be cast to ahn
	at aqo.a(SourceFile:148)
	at aqv$a.c(SourceFile:373)
	at aym.a(SourceFile:107)
	at aym.a(SourceFile:127)
	at aym.a(SourceFile:82)
	at ayk.a(SourceFile:82)
	at ayk.a(SourceFile:40)
	at ayk.a(SourceFile:30)
	at vb.a(SourceFile:89)
	at va.a(SourceFile:70)
	at vb.a(SourceFile:68)
	at vb.a(SourceFile:122)
	at ty.c(SourceFile:53)
	at th.a(SourceFile:102)
	at ry.cd(SourceFile:631)
	at rx.n(SourceFile:1688)
	at ry.n(SourceFile:484)
	at rl.n(SourceFile:134)
	at vs.n(SourceFile:41)
	at rx.m(SourceFile:1550)
	at ry.m(SourceFile:275)
	at ahn.a(SourceFile:1481)
	at lq.a(SourceFile:719)
	at ahn.g(SourceFile:1459)
	at ahn.k(SourceFile:1349)
	at lq.k(SourceFile:552)
	at net.minecraft.server.MinecraftServer.D(SourceFile:618)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bxx.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	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 aqo.a(SourceFile:148)
	at aqv$a.c(SourceFile:373)
	at aym.a(SourceFile:107)
	at aym.a(SourceFile:127)
	at aym.a(SourceFile:82)
	at ayk.a(SourceFile:82)
	at ayk.a(SourceFile:40)
	at ayk.a(SourceFile:30)
	at vb.a(SourceFile:89)
	at va.a(SourceFile:70)
	at vb.a(SourceFile:68)
	at vb.a(SourceFile:122)
	at ty.c(SourceFile:53)
	at th.a(SourceFile:102)
	at ry.cd(SourceFile:631)
	at rx.n(SourceFile:1688)
	at ry.n(SourceFile:484)
	at rl.n(SourceFile:134)
	at vs.n(SourceFile:41)
	at rx.m(SourceFile:1550)
	at ry.m(SourceFile:275)
	at ahn.a(SourceFile:1481)
	at lq.a(SourceFile:719)
	at ahn.g(SourceFile:1459)

-- Entity being ticked --
Details:
	Entity Type: Cow (vu)
	Entity ID: 1058
	Entity Name: Cow
	Entity's Exact location: 407.45, 72.88, 141.45
	Entity's Block location: World: (407,72,141), Chunk: (at 7,4,13 in 25,8; contains blocks 400,0,128 to 415,255,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: -0.12, -0.08, -0.32
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at ahn.k(SourceFile:1349)
	at lq.k(SourceFile:552)

-- Affected level --
Details:
	Level name: LastCraft Map
	All players: 1 total; [ls['YonatanZ'/221, l='LastCraft Map', x=411.12, y=72.00, z=140.12]]
	Chunk stats: ServerChunkCache: 1379 Drop: 0
	Level seed: -7181338459762185279
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (32,64,252), Chunk: (at 0,4,12 in 2,15; contains blocks 32,0,240 to 47,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 82664501 game time, 1213804 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 140022 (now: false), thunder time: 67763 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:618)
	at net.minecraft.server.MinecraftServer.C(SourceFile:546)
	at bxx.C(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:450)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 15w45a
	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: 477173264 bytes (455 MB) / 1533018112 bytes (1462 MB) up to 7635730432 bytes (7282 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx8G
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ls['YonatanZ'/221, l='LastCraft Map', x=411.12, y=72.00, z=140.12]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.