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If you using optirun to play game, and you input a Chinese character(such as 新的世界), the game will crash and game window will close suddenly.
The log will report contents just like the screenshot displays.
Directly paste Chinese characters from other place cannot trigger the crash.
How to trigger the crash
Run command in the terminal to start the launcher:
/usr/bin/optirun minecraft-launcher
Then start the game.
Find a place which it can input, then input some Chinese characters(such as 新的世界; Must use Chinese input method to input Chinese)
This is an issue with Bumblebee's Optirun - I recommend reporting this on their bug tracker so they can have a look: https://github.com/Bumblebee-Project/Bumblebee/issues