[1.12.2] Null Pointer Ecxeption

[Skaphegor]

This happens in single player world. Cannot join anymore after removing SecretRooms and OpenBlocks.
crash-2019-01-23_17.25.12-server.txt
crash-2019-01-23_17.27.43-server.txt

[Skaphegor]

I cannot even create a new world.

[TheFloydman]

Wonky stuff can happen whenever you remove mods in Minecraft, especially if the ones you remove do more than just add blocks. Were you in a Mystcraft dimension when you last disconnected?

[Skaphegor]

No. I just tried to go in my creative world. I cannot even create a new world. I had this bug also with an older version, but the world was 4 month old so I did not report that. This is actually the same issue now.

[Skaphegor]

Even the disconnection is confusing because I join a single player world.

[TheFloydman]

Can you provide a crash report from single player?

[Skaphegor]

The crash reports a from single player.

[Skaphegor]

Removing mods should also never effect creating a new world.

I have a guess what is causing that. I will test around.

[TheFloydman]

Huh, I'm used to seeing client crash logs end in "client", not "server". Anyway, you might also try making a new instance where the other mods are never added, or possibly delete the Mystcraft configs.

[Skaphegor]

Deleting Mytcraft's config let me join a new world.

The crash appears after forge stated that the backup level.dat is being used.

[Skaphegor]

I removed VanillaFix and FastWorkBench. The crash is always the same.
crash-2019-01-23_18.33.40-server.txt

[Veovis-Muaddib]

Did your world crash or otherwise hard shutdown prior to this crash appearing?

I'm thinking one of your agedata_XX.dat files was left empty or in a corrupted state.

[Skaphegor]

No. It crashes in loading screen after "building terrain" has been appeared.

[Veovis-Muaddib]

I mean prior to this particular crash appearing. The last time you successfully launched the game, did it shutdown safely?

[Skaphegor]

Yes, ever shut down safely.

[Veovis-Muaddib]

Inside your save file, back up and delete your agedata_XX.dat files and try launching again.

[Skaphegor]

I have already deleted all not needed .dat files. This hasn't had any effect. I had to add OpenBlocks back though. This was the only way to load the world.

Deleting all Mystcraft content also changed the crash. Seems that is not related to Mystcraft only.
crash-2019-01-23_19.32.56-server.txt

[Veovis-Muaddib]

Appears to be caused by a missing Villager profession with a Gravestone mod that creates graves for each profession.

NightKosh/Gravestone-mod-Extended#197

[Skaphegor]

It creates a corpse for each profession no grave. The corpse can be found a resurrected.
The corpse should be vanished instead of being null if a profession is missing though.

[Veovis-Muaddib]

Good find, thanks for bringing it to our attention. Remember that Mystcraft also adds a profession, though hopefully you won't uninstall it. :P

[Skaphegor]

I only removed it to identify the bug, which turned out not being Mystcraft's fault. So it is still in.