Mining Ender Dragon Head Crashes the game

Mining the ender dragon head caused the screen to crash in a light pink. Was not able to snap pic because it happened sot fast. Here is the crash report

---- Minecraft Crash Report ----
// There are four lights!

Time: 8/15/15 1:50 AM
Description: Rendering entity in world

java.lang.NullPointerException: Rendering entity in world
	at acj.j(SourceFile:229)
	at bjq.b(SourceFile:50)
	at bjq.a(SourceFile:35)
	at boa.a(SourceFile:212)
	at bny.a(SourceFile:109)
	at bny.a(SourceFile:19)
	at bnn.a(SourceFile:302)
	at bnn.a(SourceFile:267)
	at bnn.a(SourceFile:234)
	at bjt.a(SourceFile:605)
	at bjm.a(SourceFile:1253)
	at bjm.b(SourceFile:1158)
	at bjm.a(SourceFile:1005)
	at ayy.au(SourceFile:905)
	at ayy.a(SourceFile:328)
	at net.minecraft.client.main.Main.main(SourceFile:125)


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

-- Head --
Stacktrace:
	at acj.j(SourceFile:229)
	at bjq.b(SourceFile:50)
	at bjq.a(SourceFile:35)
	at boa.a(SourceFile:212)
	at bny.a(SourceFile:109)
	at bny.a(SourceFile:19)

-- Entity being rendered --
Details:
	Entity Type: Item (xc)
	Entity ID: 3538455
	Entity Name: ~~ERROR~~ NullPointerException: null
	Entity's Exact location: -1041.28, 145.25, 1323.41
	Entity's Block location: -1042.00,145.00,1323.00 - World: (-1042,145,1323), Chunk: (at 14,9,11 in -66,82; contains blocks -1056,0,1312 to -1041,255,1327), Region: (-3,2; contains chunks -96,64 to -65,95, blocks -1536,0,1024 to -1025,255,1535)
	Entity's Momentum: 0.03, 0.16, -0.02
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null

-- Renderer details --
Details:
	Assigned renderer: bny@502051e2
	Location: 1.13,-0.75,-0.02 - World: (1,-1,-1), Chunk: (at 1,-1,15 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)
	Rotation: 84.04532
	Delta: 0.40935314
Stacktrace:
	at bnn.a(SourceFile:302)
	at bnn.a(SourceFile:267)
	at bnn.a(SourceFile:234)
	at bjt.a(SourceFile:605)
	at bjm.a(SourceFile:1253)
	at bjm.b(SourceFile:1158)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [biz['trainboy2019'/3505715, l='MpServer', x=-1042.41, y=146.00, z=1323.43]]
	Chunk stats: MultiplayerChunkCache: 1083, 1083
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: 323.00,65.00,-23.00 - World: (323,65,-23), Chunk: (at 3,4,9 in 20,-2; contains blocks 320,0,-32 to 335,255,-17), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 698743 game time, 127261 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: ~~ERROR~~ NullPointerException: null
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bhb.a(SourceFile:314)
	at ayy.b(SourceFile:2297)
	at ayy.a(SourceFile:337)
	at net.minecraft.client.main.Main.main(SourceFile:125)

-- System Details --
Details:
	Minecraft Version: 15w33c
	Operating System: Mac OS X (x86_64) version 10.9.4
	Java Version: 1.6.0_65, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 680748688 bytes (649 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 15w33c
	LWJGL: 2.9.2
	OpenGL: NVIDIA GeForce GT 750M OpenGL Engine GL version 2.1 NVIDIA-8.26.26 310.40.45f01, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: 1..9
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	CPU: 8x Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz