Hopper: java.lang.NullPointerException acc.<init>(SourceFile:90)

java.lang.NullPointerException
	at acc.<init>(SourceFile:90)
	at ats.a(SourceFile:1426)
	at awe.e(SourceFile:157)
	at awe.a(SourceFile:122)
	at awb.a(SourceFile:69)
	at awb.d(SourceFile:128)
	at awb.m(SourceFile:107)

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

Time: 8/2/13 5:08 PM
Description: Updating screen events

java.lang.NullPointerException
	at acc.<init>(SourceFile:90)
	at ats.a(SourceFile:1426)
	at awe.e(SourceFile:157)
	at awe.a(SourceFile:122)
	at awb.a(SourceFile:69)
	at awb.d(SourceFile:128)
	at awb.m(SourceFile:107)
	at ats.k(SourceFile:1158)
	at ats.S(SourceFile:663)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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

-- Head --
Stacktrace:
	at acc.<init>(SourceFile:90)
	at ats.a(SourceFile:1426)
	at awe.e(SourceFile:157)
	at awe.a(SourceFile:122)
	at awb.a(SourceFile:69)
	at awb.d(SourceFile:128)
	at awb.m(SourceFile:107)

-- Affected screen --
Details:
	Screen name: blq
Stacktrace:
	at ats.k(SourceFile:1158)
	at ats.S(SourceFile:663)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Mac OS X (x86_64) version 10.6.8
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 163418200 bytes (155 MB) / 325820416 bytes (310 MB) up to 1069416448 bytes (1019 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 25326 (1418256 bytes; 1 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: NVIDIA GeForce 9400M OpenGL Engine GL version 2.1 NVIDIA-1.6.36, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: John Smith Legacy
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null