What happened:

I enabled fullscreen from the videosettings while in-game, then suddenly the game crashed.

Error log:

https://pastebin.com/erEYVRNS

Edit:

I found out this is a duplicate of MC-128117. The original thread is "resolved" (it was in 1.12.2) but the bug remains.

Edit 2:

I found a second duplicate MC-5520 (wich has 67 duplicates, HOW IS THIS POSSIBLE?!), it's "resolved" as well (it was in 1.11.2) but the bug remains