I open the world which was backed up from the server and within a few seconds it crashes

What I expected to happen was...:
Minecraft to not crash

What actually happened was...:
Minecraft crashed

Steps to Reproduce:
1. Open Minecraft
2. Open Single Player game on the world
3. Watch it crash

---- Minecraft Crash Report ----
// But it works on my machine.

Time: 27/01/15 10:12
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at ayv.f(SourceFile:263)
at are.b(SourceFile:123)
at are.a(SourceFile:59)
at sp.a(SourceFile:514)
at wx.c(SourceFile:1749)
at adx.c(SourceFile:312)
at wx.K(SourceFile:303)
at wx.t_(SourceFile:266)
at adx.t_(SourceFile:77)
at aqr.a(SourceFile:1407)
at qu.a(SourceFile:600)
at aqr.g(SourceFile:1385)
at aqr.i(SourceFile:1278)
at qu.i(SourceFile:478)
at net.minecraft.server.MinecraftServer.A(SourceFile:608)
at net.minecraft.server.MinecraftServer.z(SourceFile:532)
at cyk.z(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:448)
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 ayv.f(SourceFile:263)
at are.b(SourceFile:123)
at are.a(SourceFile:59)
at sp.a(SourceFile:514)
at wx.c(SourceFile:1749)
at adx.c(SourceFile:312)
at wx.K(SourceFile:303)
at wx.t_(SourceFile:266)
at adx.t_(SourceFile:77)
at aqr.a(SourceFile:1407)
at qu.a(SourceFile:600)
at aqr.g(SourceFile:1385)

– Entity being ticked –
Details:
Entity Type: Item (adx)
Entity ID: 1466
Entity Name: item.item.ingotIron
Entity's Exact location: -2996.00, 8.52, -35.00
Entity's Block location: -2996.00,8.00,-35.00 - World: (-2996,8,-35), Chunk: (at 12,0,13 in -188,-3; contains blocks -3008,0,-48 to -2993,255,-33), Region: (-6,-1; contains chunks -192,-32 to -161,-1, blocks -3072,0,-512 to -2561,255,-1)
Entity's Momentum: 0.04, 0.18, -0.29
Entity's Rider: ~_ERROR~ NullPointerException: null
Entity's Vehicle: ~_ERROR~ NullPointerException: null
Stacktrace:
at aqr.i(SourceFile:1278)
at qu.i(SourceFile:478)

– Affected level –
Details:
Level name: world
All players: 1 total; [qx['Irtimaled'/88, l='world', x=-23215.06, y=149.00, z=-508.33]]
Chunk stats: ServerChunkCache: 1253 Drop: 0
Level seed: 1388686731339073786
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: -23970.00,64.00,-230.00 - World: (-23970,64,-230), Chunk: (at 14,4,10 in -1499,-15; contains blocks -23984,0,-240 to -23969,255,-225), Region: (-47,-1; contains chunks -1504,-32 to -1473,-1, blocks -24064,0,-512 to -23553,255,-1)
Level time: 1474786981 game time, 2477759 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 92110 (now: false), thunder time: 67240 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.A(SourceFile:608)
at net.minecraft.server.MinecraftServer.z(SourceFile:532)
at cyk.z(SourceFile:155)
at net.minecraft.server.MinecraftServer.run(SourceFile:448)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.8.1
Operating System: Mac OS X (x86_64) version 10.10.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 256882104 bytes (244 MB) / 753074176 bytes (718 MB) up to 4281597952 bytes (4083 MB)
JVM Flags: 5 total; -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [qx['Irtimaled'/88, l='world', x=-23215.06, y=149.00, z=-508.33]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.