Hopper: java.lang.NullPointerException: Rendering screen

java.lang.NullPointerException: Rendering screen
	at afv.<init>(SourceFile:90)
	at azd.a(SourceFile:1587)
	at bce.e(SourceFile:162)
	at bcf.a(SourceFile:214)
	at bay.a(SourceFile:186)
	at bce.a(SourceFile:187)

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

Time: 25.10.13 15:44
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
	at afv.<init>(SourceFile:90)
	at azd.a(SourceFile:1587)
	at bce.e(SourceFile:162)
	at bcf.a(SourceFile:214)
	at bay.a(SourceFile:186)
	at bce.a(SourceFile:187)
	at bll.b(SourceFile:851)
	at azd.ad(SourceFile:780)
	at azd.e(SourceFile:704)
	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 afv.<init>(SourceFile:90)
	at azd.a(SourceFile:1587)
	at bce.e(SourceFile:162)
	at bcf.a(SourceFile:214)
	at bay.a(SourceFile:186)
	at bce.a(SourceFile:187)

-- Screen render details --
Details:
	Screen name: btj
	Mouse location: Scaled: (282, 96). Absolute: (565, 512)
	Screen size: Scaled: (683, 353). Absolute: (1366, 706). Scale factor of 2
Stacktrace:
	at bll.b(SourceFile:851)
	at azd.ad(SourceFile:780)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.6.0_20, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
	Memory: 80875816 bytes (77 MB) / 112291840 bytes (107 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: 1.7.2
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6310 Graphics       GL version 4.1.10834 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Deutsch (Deutschland)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)