Snapshot not working. I put crash report in description

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

Time: 5/18/13 12:27 PM
Description: Initializing game

java.lang.NullPointerException
	at bhl.g(SourceFile:49)
	at bhl.<init>(SourceFile:31)
	at bhn.<init>(SourceFile:13)
	at bhq.c(SourceFile:115)
	at bhq.<init>(SourceFile:37)
	at asm.L(SourceFile:260)
	at asm.c(SourceFile:524)
	at net.minecraft.client.main.Main.main(SourceFile:78)


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

-- Head --
Stacktrace:
	at bhl.g(SourceFile:49)
	at bhl.<init>(SourceFile:31)
	at bhn.<init>(SourceFile:13)
	at bhq.c(SourceFile:115)
	at bhq.<init>(SourceFile:37)
	at asm.L(SourceFile:260)

-- Initialization --
Details:
Stacktrace:
	at asm.c(SourceFile:524)
	at net.minecraft.client.main.Main.main(SourceFile:78)

-- System Details --
Details:
	Minecraft Version: 13w19a
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_15, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 34473832 bytes (32 MB) / 55836672 bytes (53 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 7520G GL version 4.2.11764 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: FaithfulTexturePack.zip
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null