Put the summary of the bug you're having here

What I expected to happen was...:
No crash when i start map

What actually happened was...:
Minecraft is crashed when i start pervious map
The map is made at 1.7.4 version and execute until 14w02c well

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 14. 1. 19 오후 12:49
Description: Loading entity NBT

java.lang.NullPointerException: Loading entity NBT
at ww.a(SourceFile:222)
at rl.f(SourceFile:1197)
at agr.a(SourceFile:131)
at agr.a(SourceFile:254)
at bpv.a(SourceFile:19)
at bpv.a(SourceFile:14)
at bpv.a(SourceFile:9)
at bpq.a(SourceFile:104)
at bpq.a(SourceFile:96)
at bpg.a(SourceFile:389)
at boz.a(SourceFile:1085)
at boz.b(SourceFile:871)
at bbm.ah(SourceFile:791)
at bbm.f(SourceFile:718)
at net.minecraft.client.main.Main.main(SourceFile:154)

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

– Head –
Stacktrace:
at ww.a(SourceFile:222)

– Entity being loaded –
Details:
Entity Type: FallingSand (ww)
Entity ID: 416
Entity Name: Falling Block
Entity's Exact location: -11.50, 21.00, -72.50
Entity's Block location: -12.00,21.00,-73.00 - World: (-12,21,-73), Chunk: (at 4,1,7 in -1,-5; contains blocks -16,0,-80 to -1,255,-65), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Entity's Momentum: 0.00, 0.00, 0.00
Entity's Rider: ~_ERROR~ NullPointerException: null
Entity's Vehicle: ~_ERROR~ NullPointerException: null
Immitating block ID: -1
Immitating block data: 0
Stacktrace:
at rl.f(SourceFile:1197)
at agr.a(SourceFile:131)
at agr.a(SourceFile:254)
at bpv.a(SourceFile:19)
at bpv.a(SourceFile:14)
at bpv.a(SourceFile:9)

– Block Entity Details –
Details:
Name: MobSpawner // apw
Block type: ID #52 (tile.mobSpawner // amf)
Block data value: 0 / 0x0 / 0b0000
Block location: World: (-12,20,-73), Chunk: (at 4,1,7 in -1,-5; contains blocks -16,0,-80 to -1,255,-65), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Actual block type: ID #52 (tile.mobSpawner // amf)
Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
at bpq.a(SourceFile:104)
at bpq.a(SourceFile:96)
at bpg.a(SourceFile:389)
at boz.a(SourceFile:1085)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bmp['ygh1213'/170, l='MpServer', x=0.95, y=22.62, z=-57.57]]
Chunk stats: MultiplayerChunkCache: 110, 110
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: 0.00,21.00,-43.00 - World: (0,21,-43), Chunk: (at 0,1,5 in 0,-3; contains blocks 0,0,-48 to 15,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 29353597 game time, 410215 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: 168 total; [yk['사냥터 주인'/0, l='MpServer', x=-31.50, y=21.00, z=-80.50], yk['블레이즈 주인'/1, l='MpServer', x=-24.50, y=21.00, z=-89.50], yk['낚시터주인'/2, l='MpServer', x=-27.50, y=21.00, z=-57.50], yk['마녀 주인'/3, l='MpServer', x=-14.50, y=21.00, z=-89.50], yk['소 주인'/4, l='MpServer', x=-4.50, y=21.00, z=-89.50], sg['entity.ItemFrame.name'/5, l='MpServer', x=4.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/6, l='MpServer', x=6.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/7, l='MpServer', x=5.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/8, l='MpServer', x=6.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/9, l='MpServer', x=4.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/10, l='MpServer', x=5.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/11, l='MpServer', x=4.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/12, l='MpServer', x=5.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/13, l='MpServer', x=6.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/14, l='MpServer', x=6.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/15, l='MpServer', x=5.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/17, l='MpServer', x=4.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/16, l='MpServer', x=4.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/19, l='MpServer', x=6.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/18, l='MpServer', x=5.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/21, l='MpServer', x=9.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/20, l='MpServer', x=8.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/23, l='MpServer', x=10.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/22, l='MpServer', x=9.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/25, l='MpServer', x=8.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/24, l='MpServer', x=9.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/27, l='MpServer', x=9.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/26, l='MpServer', x=8.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/29, l='MpServer', x=12.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/28, l='MpServer', x=10.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/31, l='MpServer', x=14.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/30, l='MpServer', x=13.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/34, l='MpServer', x=12.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/35, l='MpServer', x=12.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/32, l='MpServer', x=14.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/33, l='MpServer', x=13.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/38, l='MpServer', x=13.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/39, l='MpServer', x=14.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/36, l='MpServer', x=13.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/37, l='MpServer', x=9.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/42, l='MpServer', x=14.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/43, l='MpServer', x=13.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/40, l='MpServer', x=13.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/41, l='MpServer', x=14.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/46, l='MpServer', x=9.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/47, l='MpServer', x=10.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/44, l='MpServer', x=10.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/45, l='MpServer', x=9.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/51, l='MpServer', x=8.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/50, l='MpServer', x=8.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/49, l='MpServer', x=9.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/48, l='MpServer', x=10.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/55, l='MpServer', x=12.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/54, l='MpServer', x=12.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/53, l='MpServer', x=8.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/52, l='MpServer', x=9.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/59, l='MpServer', x=13.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/58, l='MpServer', x=12.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/57, l='MpServer', x=13.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/56, l='MpServer', x=14.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/63, l='MpServer', x=5.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/62, l='MpServer', x=6.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/61, l='MpServer', x=5.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/60, l='MpServer', x=4.50, y=23.50, z=-74.06], yk['ygh'/68, l='MpServer', x=12.50, y=21.00, z=-63.50], yk['화폐교환'/69, l='MpServer', x=4.50, y=21.00, z=-63.50], yk['잡화'/70, l='MpServer', x=6.50, y=21.00, z=-63.50], yk['ygh'/71, l='MpServer', x=12.69, y=21.00, z=-57.31], sg['entity.ItemFrame.name'/64, l='MpServer', x=5.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/65, l='MpServer', x=10.50, y=22.50, z=-74.06], yk['방어구'/66, l='MpServer', x=4.53, y=21.00, z=-57.31], yk['ygh'/67, l='MpServer', x=8.50, y=21.00, z=-63.50], sg['entity.ItemFrame.name'/76, l='MpServer', x=16.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/77, l='MpServer', x=17.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/78, l='MpServer', x=17.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/79, l='MpServer', x=18.50, y=22.50, z=-78.94], yk['도구'/72, l='MpServer', x=10.69, y=21.00, z=-57.31], yk['ygh'/73, l='MpServer', x=10.50, y=21.00, z=-63.50], yk['검'/74, l='MpServer', x=6.59, y=21.00, z=-57.31], yk['활'/75, l='MpServer', x=8.63, y=21.00, z=-57.31], sg['entity.ItemFrame.name'/85, l='MpServer', x=18.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/84, l='MpServer', x=17.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/87, l='MpServer', x=17.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/86, l='MpServer', x=18.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/81, l='MpServer', x=17.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/80, l='MpServer', x=18.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/83, l='MpServer', x=16.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/82, l='MpServer', x=17.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/93, l='MpServer', x=17.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/92, l='MpServer', x=18.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/95, l='MpServer', x=17.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/94, l='MpServer', x=16.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/89, l='MpServer', x=16.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/88, l='MpServer', x=16.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/91, l='MpServer', x=18.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/90, l='MpServer', x=17.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/102, l='MpServer', x=20.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/103, l='MpServer', x=22.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/100, l='MpServer', x=21.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/101, l='MpServer', x=20.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/98, l='MpServer', x=22.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/99, l='MpServer', x=22.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/96, l='MpServer', x=16.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/97, l='MpServer', x=20.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/110, l='MpServer', x=24.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/111, l='MpServer', x=25.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/108, l='MpServer', x=25.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/109, l='MpServer', x=24.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/106, l='MpServer', x=26.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/107, l='MpServer', x=26.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/104, l='MpServer', x=21.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/105, l='MpServer', x=24.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/119, l='MpServer', x=24.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/118, l='MpServer', x=24.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/117, l='MpServer', x=25.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/116, l='MpServer', x=26.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/115, l='MpServer', x=25.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/114, l='MpServer', x=24.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/113, l='MpServer', x=25.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/112, l='MpServer', x=26.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/127, l='MpServer', x=20.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/126, l='MpServer', x=20.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/125, l='MpServer', x=21.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/124, l='MpServer', x=22.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/123, l='MpServer', x=25.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/122, l='MpServer', x=26.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/121, l='MpServer', x=26.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/120, l='MpServer', x=25.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/137, l='MpServer', x=28.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/136, l='MpServer', x=28.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/139, l='MpServer', x=30.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/138, l='MpServer', x=29.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/141, l='MpServer', x=30.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/140, l='MpServer', x=30.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/143, l='MpServer', x=28.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/142, l='MpServer', x=29.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/129, l='MpServer', x=22.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/128, l='MpServer', x=22.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/131, l='MpServer', x=20.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/130, l='MpServer', x=21.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/133, l='MpServer', x=21.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/132, l='MpServer', x=21.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/135, l='MpServer', x=29.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/134, l='MpServer', x=29.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/152, l='MpServer', x=28.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/153, l='MpServer', x=28.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/154, l='MpServer', x=28.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/155, l='MpServer', x=21.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/156, l='MpServer', x=25.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/157, l='MpServer', x=33.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/158, l='MpServer', x=32.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/159, l='MpServer', x=32.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/144, l='MpServer', x=21.50, y=21.50, z=-74.06], sg['entity.ItemFrame.name'/145, l='MpServer', x=30.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/146, l='MpServer', x=29.50, y=21.50, z=-78.94], sg['entity.ItemFrame.name'/147, l='MpServer', x=29.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/148, l='MpServer', x=30.50, y=22.50, z=-78.94], sg['entity.ItemFrame.name'/149, l='MpServer', x=30.50, y=23.50, z=-78.94], sg['entity.ItemFrame.name'/150, l='MpServer', x=29.50, y=24.50, z=-78.94], sg['entity.ItemFrame.name'/151, l='MpServer', x=29.50, y=23.50, z=-78.94], bmp['ygh1213'/170, l='MpServer', x=0.95, y=22.62, z=-57.57], sg['entity.ItemFrame.name'/163, l='MpServer', x=34.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/162, l='MpServer', x=34.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/161, l='MpServer', x=33.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/160, l='MpServer', x=32.50, y=23.50, z=-74.06], sg['entity.ItemFrame.name'/166, l='MpServer', x=33.50, y=22.50, z=-74.06], sg['entity.ItemFrame.name'/165, l='MpServer', x=33.50, y=24.50, z=-74.06], sg['entity.ItemFrame.name'/164, l='MpServer', x=34.50, y=21.50, z=-74.06]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bmk.a(SourceFile:298)
at bbm.b(SourceFile:2017)
at bbm.f(SourceFile:727)
at net.minecraft.client.main.Main.main(SourceFile:154)

– System Details –
Details:
Minecraft Version: 14w03b
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_40, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 155222832 bytes (148 MB) / 466092032 bytes (444 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w03b
LWJGL: 2.9.1
OpenGL: GeForce GT 610/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Anisotropic Filtering: Off (1)