Put the summary of the bug you're having here
I expected that it changes the Recource Pack
It Crashed
1. I launched Minecraft and go in the Texturepack Menu
2. I clicked on a Recource Pack what I converted from a Texture Pack
3. Then it loaded and crashed after it was finished
Environment
OS: Windows 8 (ver 6.2, arch amd64)
Java: 1.7.0_17 (by Oracle Corporation)
Launcher: 0.9.3 (Dev) (bootstrap 3)
Minecraft: 13w24b (updated Fri Jun 14 15:54:59 CEST 2013)
Based on a crash report provided in this issue, I believe with high certainty that this report may be a duplicate of MC-17852. You can view all information known about this specific crash at MCX-680.