Bug

Put the summary of the bug you're having here

What I expected to happen was...:
I just bought Minecraft, installed a new Skin Texture and wanted to test my skin in a random/new world

What actually happened was...:
After loading the word/a new world, Minecraft suddenly does no longer response (goes white) and then closes after several minutes

Steps to Reproduce:
0. The Skin could have caused the issue, but I am not sure yet
1. starting Minecraft, just as usuall
2. enter a world
3. Minecraft: NoResponse