Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-198494/

Crash:

java.lang.NullPointerException
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bnd.c(SourceFile:69)
	at bns.a(SourceFile:31)
	at bns.a(SourceFile:86)
	at awp.b(SourceFile:458)
	at bdk.a(SourceFile:147)
	at azq.a(SourceFile:172)
	at bdk.a(SourceFile:154)
	at azq.d(SourceFile:236)
	at azq.m(SourceFile:211)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 21.9.2013 10:59
Description: Updating screen events

java.lang.NullPointerException
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bnd.c(SourceFile:69)
	at bns.a(SourceFile:31)
	at bns.a(SourceFile:86)
	at awp.b(SourceFile:458)
	at bdk.a(SourceFile:147)
	at azq.a(SourceFile:172)
	at bdk.a(SourceFile:154)
	at azq.d(SourceFile:236)
	at azq.m(SourceFile:211)
	at awp.o(SourceFile:1256)
	at awp.aa(SourceFile:726)
	at awp.e(SourceFile:677)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bnd.c(SourceFile:69)
	at bns.a(SourceFile:31)
	at bns.a(SourceFile:86)
	at awp.b(SourceFile:458)
	at bdk.a(SourceFile:147)
	at azq.a(SourceFile:172)
	at bdk.a(SourceFile:154)
	at azq.d(SourceFile:236)
	at azq.m(SourceFile:211)

-- Affected screen --
Details:
	Screen name: bdk
Stacktrace:
	at awp.o(SourceFile:1256)
	at awp.aa(SourceFile:726)
	at awp.e(SourceFile:677)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38c
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 114115832 bytes (108 MB) / 255594496 bytes (243 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: 12, tallocated: 94
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: GeForce 9600 GT/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [Potta pack.zip]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-198494/12874387/