Hopper: java.lang.NullPointerException: Rendering screen

java.lang.NullPointerException: Rendering screen
	at abg.c(SourceFile:99)
	at bmw.a(SourceFile:263)
	at bat.a(SourceFile:146)
	at bat.a(SourceFile:203)
	at bak.b(SourceFile:382)
	at bak.a(SourceFile:259)
	at bas.a(SourceFile:122)

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 10/11/13 4:45 PM
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
	at abg.c(SourceFile:99)
	at bmw.a(SourceFile:263)
	at bat.a(SourceFile:146)
	at bat.a(SourceFile:203)
	at bak.b(SourceFile:382)
	at bak.a(SourceFile:259)
	at bas.a(SourceFile:122)
	at bkr.b(SourceFile:851)
	at ayp.ab(SourceFile:783)
	at ayp.e(SourceFile:706)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at abg.c(SourceFile:99)
	at bmw.a(SourceFile:263)
	at bat.a(SourceFile:146)
	at bat.a(SourceFile:203)
	at bak.b(SourceFile:382)
	at bak.a(SourceFile:259)
	at bas.a(SourceFile:122)

-- Screen render details --
Details:
	Screen name: bas
	Mouse location: Scaled: (278, 296). Absolute: (834, 66)
	Screen size: Scaled: (640, 319). Absolute: (1920, 956). Scale factor of 3
Stacktrace:
	at bkr.b(SourceFile:851)
	at ayp.ab(SourceFile:783)
	at ayp.e(SourceFile:706)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w41b
	Operating System: Mac OS X (x86_64) version 10.8.5
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 69642392 bytes (66 MB) / 124837888 bytes (119 MB) up to 1069416448 bytes (1019 MB)
	JVM Flags: 1 total; -Xmx1G
	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: 13w41b
	LWJGL: 2.9.0
	OpenGL: NVIDIA GeForce 9400 OpenGL Engine GL version 2.1 NVIDIA-8.16.74 310.40.00.10f02, NVIDIA Corporation
	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
	Anisotropic Filtering: Off (1)