Crash after world rendering

Hello,
today I started my minecraft normal (I thought at least). Then I opened my world in the version '1.9-pre2'. After that, my screen looked like this: (Attachment). And then - at the exact moment in which my world should build - crashes minecraft.

PLEASE READ THE 'Environment' TAB!

Can anyone help me? Had someone the same / a similar problem?

DeBedenHasen