---- Minecraft Crash Report ----
// Shall we play a game?

Time: 4/3/13 1:34 PM
Description: Failed to start game

java.lang.NullPointerException
	at java.lang.String.length(Unknown Source)
	at java.io.Win32FileSystem.prefixLength(Unknown Source)
	at java.io.File.<init>(Unknown Source)
	at sun.net.www.protocol.file.Handler.openConnection(Unknown Source)
	at sun.net.www.protocol.file.Handler.openConnection(Unknown Source)
	at java.net.URL.openConnection(Unknown Source)
	at sun.net.www.protocol.jar.JarURLConnection.<init>(Unknown Source)
	at sun.net.www.protocol.jar.Handler.openConnection(Unknown Source)
	at java.net.URL.openConnection(Unknown Source)
	at java.net.URLClassLoader.getResourceAsStream(Unknown Source)
	at java.lang.Class.getResourceAsStream(Unknown Source)
	at bjr.c(SourceFile:19)
	at bjq.b(SourceFile:117)
	at bir.a(SourceFile:122)
	at bir.c(SourceFile:86)
	at bis.b(SourceFile:80)
	at bgf.d(SourceFile:350)
	at net.minecraft.client.Minecraft.a(SourceFile:298)
	at avv.a(SourceFile:56)
	at net.minecraft.client.Minecraft.run(SourceFile:507)
	at java.lang.Thread.run(Unknown Source)


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

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 475951096 bytes (453 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	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: 2.4.2
	OpenGL: ATI Mobility Radeon HD 4250          GL version 3.2.9712 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: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null