Hopper: java.lang.NullPointerException

java.lang.NullPointerException
	at ayq.a(SourceFile:200)
	at ayh.b(SourceFile:382)
	at ayh.a(SourceFile:259)
	at ayp.a(SourceFile:122)

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 26/09/13 17:11
Description: Rendering screen

java.lang.NullPointerException
	at ayq.a(SourceFile:200)
	at ayh.b(SourceFile:382)
	at ayh.a(SourceFile:259)
	at ayp.a(SourceFile:122)
	at bii.b(SourceFile:847)
	at awo.aa(SourceFile:781)
	at awo.e(SourceFile:704)
	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 ayq.a(SourceFile:200)
	at ayh.b(SourceFile:382)
	at ayh.a(SourceFile:259)
	at ayp.a(SourceFile:122)

-- Screen render details --
Details:
	Screen name: ayp
	Mouse location: Scaled: (204, 231). Absolute: (614, 73)
	Screen size: Scaled: (456, 256). Absolute: (1366, 768). Scale factor of 3
Stacktrace:
	at bii.b(SourceFile:847)
	at awo.aa(SourceFile:781)
	at awo.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w39a
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 86449152 bytes (82 MB) / 174911488 bytes (166 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w39a
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics GL version 3.1.0 - Build 9.17.10.2828, Intel
	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)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null