After downloading MC version 20w17a, I tried to optimize my survival world, which was saved in version 20w16a. After selecting either of the optimize options (backup or not), Minecraft suddenly crashes, leaving this message (The image file).
Environment
Pop! OS (Ubuntu 19.10), Linux Kernel 5.3.0-46, JDK 11.0.6, MC Launcher 2.1.13829
See MC-179841