I have been downloading sphax texturepack and after that it crashed

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I have been downloading sphax texturepack and after that it crashed

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

I have been downloading sphax texturepack and after that it crashed

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...