Minecraft randomly closes without going to the error screen.

Put the summary of the bug you're having here

What I expected to happen was...:
I thought I could just keep playing. This bug occurs at random times.

What actually happened was...:
Minecraft crashes without going to the error screen, it closes automatically.

Steps to Reproduce:
I'm sorry, but I can't produce it. It happens at random times. Once again, I'm very sorry.