It is in the changelog.
Confirmed for 18w07a.
Particles where set to minimum.
All particles and decreased particles work.
Can you put the launcher in English so that we can read the error message.
Try remove the computer mouse and plug it back in.
Yes, it does still happen.
Maybe, you can break the jukeboxes it is playing from.
Isn't it just the background music playing?
It's probably caused by your texture pack.
I also have the same problem in my world so i edited the world. I put the player in the end dimension en it worked completely fine. As soon as I went trough the end portal i got the same crash.
Sea grass spawning inside structures.