Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-196433/

Crash:

java.lang.NullPointerException
	at bkl.a(SourceFile:81)
	at bkl.a(SourceFile:15)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 20.09.13 15:55
Description: Rendering entity in world

java.lang.NullPointerException
	at bkl.a(SourceFile:81)
	at bkl.a(SourceFile:15)
	at bjq.a(SourceFile:215)
	at bjq.a(SourceFile:190)
	at bjq.a(SourceFile:167)
	at bip.a(SourceFile:347)
	at bii.a(SourceFile:974)
	at bii.b(SourceFile:807)
	at awp.aa(SourceFile:754)
	at awp.e(SourceFile:677)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at bkl.a(SourceFile:81)
	at bkl.a(SourceFile:15)

-- Entity being rendered --
Details:
	Entity Type: MinecartRideable (tz)
	Entity ID: 32
	Entity Name: entity.MinecartRideable.name
	Entity's Exact location: -223,50, 79,50, 239,50
	Entity's Block location: World: (-224,79,239), Chunk: (at 0,4,15 in -14,14; contains blocks -224,0,224 to -209,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Entity's Momentum: 0,00, 0,00, 0,00

-- Renderer details --
Details:
	Assigned renderer: bkl@7c8fae19
	Location: -2,82,-12,12,-5,32 - World: (-3,-13,-6), Chunk: (at 13,-1,10 in -1,-1; contains blocks -16,0,-16 to -1,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Rotation: 90.0
	Delta: 0.69781876
Stacktrace:
	at bjq.a(SourceFile:215)
	at bjq.a(SourceFile:190)
	at bjq.a(SourceFile:167)
	at bip.a(SourceFile:347)
	at bii.a(SourceFile:974)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bgh['sx54'/144, l='MpServer', x=-220,68, y=91,62, z=244,82]]
	Chunk stats: MultiplayerChunkCache: 75, 75
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-36,64,167), Chunk: (at 12,4,7 in -3,10; contains blocks -48,0,160 to -33,255,175), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 3559170 game time, 4464319 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 15 total; [sy['Owca'/205, l='MpServer', x=-250,50, y=71,00, z=251,53], tb['Kałamarnica'/204, l='MpServer', x=-247,97, y=58,22, z=240,59], tz['entity.MinecartRideable.name'/32, l='MpServer', x=-223,50, y=79,50, z=239,50], sy['Owca'/206, l='MpServer', x=-240,50, y=103,00, z=309,88], sy['Owca'/33, l='MpServer', x=-215,47, y=86,00, z=278,50], tb['Kałamarnica'/203, l='MpServer', x=-249,16, y=59,16, z=244,50], sn['Nietoperz'/43, l='MpServer', x=-142,62, y=45,31, z=197,32], tz['entity.MinecartRideable.name'/193, l='MpServer', x=-269,50, y=87,50, z=216,50], sy['Owca'/44, l='MpServer', x=-146,09, y=66,00, z=235,84], sy['Owca'/45, l='MpServer', x=-148,22, y=67,00, z=319,63], tb['Kałamarnica'/194, l='MpServer', x=-257,13, y=60,34, z=245,50], sn['Nietoperz'/25, l='MpServer', x=-239,62, y=38,00, z=227,40], sn['Nietoperz'/26, l='MpServer', x=-234,66, y=35,02, z=212,65], sn['Nietoperz'/183, l='MpServer', x=-285,41, y=33,92, z=214,97], bgh['sx54'/144, l='MpServer', x=-220,68, y=91,62, z=244,82]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bgc.a(SourceFile:297)
	at awp.b(SourceFile:1874)
	at awp.e(SourceFile:686)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_11, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 69029752 bytes (65 MB) / 258605056 bytes (246 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 20003 (1120168 bytes; 1 MB) allocated, 9370 (524720 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 13w38b
	LWJGL: 2.9.0
	OpenGL: GeForce GT 540M/PCIe/SSE2 GL version 4.2.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Polski (Polska)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2282 (127792 bytes; 0 MB) allocated, 2282 (127792 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-196433/12591595/