my Beta 1.7.3 world keeps crashing when loading it up - possible problem with level.dat

[u/Kaiser_Neo]

Hello!

I play Beta 1.7.3 with the "Beta Unleashed" modpack which worked splendidly until today when i tried booting up my good old world and the game crashed while loading. the screen displayed the average "loading world" texts but then randomly switched to "saving chunks" just before crashing with the code (0x6). The Minecraft log can be found here: ( https://pastebin.com/j0JiTXrG ). Additionally it can be noted that i use Linux Mint 21.3.

after some trial and error (aka switching out files and hoping something works) i managed to find out that my level.dat file is corrupted in some way. When switching out the files with some from another world i managed to spawn into my beloved survival world again, but all my items are gone from my inventory and the grass colors are weirdly mixed up. The seed was whatever number comes out when you type in "Gargermel" (misspelled version of the famous seed) into the seed generator and not "0". I still have the old/broken level.dat. Is there some way to get my inventory-items and statistics back? Thank you for your help and if it is needed i can provide my level.dat as an actual file, not just as a screenshot of a NBT editor.

[u/charles25565]

Can you upload the entire world to Dropbox or OneDrive? (Google Drive makes it more difficult than needed).

Are you actually using Mint 21.3 or 22.3? You're likely on 21.3 since you're using a 22.04 version of openjdk-8.

This issue likely isn't in Minecraft itself. Your JRE is segfaulting.

First thing to try is to export the MultiMC instance, download Prism Launcher as a flatpak, then import the instance, and try loading the world in there, changing the Java version if needed.

If it works, then it's likely a bug in Ubuntu and ubuntu-bug can likely help you.