Hopper: java.lang.NullPointerException / Crash when selecting Resourcepack

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-293225/

Crash:

java.lang.NullPointerException
	at bpj.a(SourceFile:72)
	at bpf.d(SourceFile:238)
	at bpe.b(SourceFile:163)
	at bpe.a(SourceFile:89)

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

---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 10/10/13 16:47
Description: Registering texture

java.lang.NullPointerException
	at bpj.a(SourceFile:72)
	at bpf.d(SourceFile:238)
	at bpe.b(SourceFile:163)
	at bpe.a(SourceFile:89)
	at bpg.a(SourceFile:72)
	at bpg.a(SourceFile:61)
	at bpg.a(SourceFile:52)
	at ays.X(SourceFile:457)
	at ays.e(SourceFile:691)
	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 bpj.a(SourceFile:72)
	at bpf.d(SourceFile:238)
	at bpe.b(SourceFile:163)
	at bpe.a(SourceFile:89)

-- Resource location being registered --
Details:
	Resource location: minecraft:textures/atlas/blocks.png
	Texture object class: bpe
Stacktrace:
	at bpg.a(SourceFile:72)
	at bpg.a(SourceFile:61)
	at bpg.a(SourceFile:52)
	at ays.X(SourceFile:457)

-- Initialization --
Details:
Stacktrace:
	at ays.e(SourceFile:691)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w41a
	Operating System: Mac OS X (x86_64) version 10.8.4
	Java Version: 1.6.0_51, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 38866968 bytes (37 MB) / 85000192 bytes (81 MB) up to 1065025536 bytes (1015 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: 13w41a
	LWJGL: 2.9.0
	OpenGL: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-8.12.47, Intel Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [Atherys Ascended x32 1]
	Current Language: Français (France)
	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-293225/16534800/