[💥]: Crash on joining singleplayer world

[50-Shades-of-Uganda]

Was this crash reported before?

• No, it was not.

Are you using Prism or Curseforge?

Yes, I am using Prism or Curseforge.

Did you install required dependencies?

• Not Applicable / Yes, I have all required dependencies installed.

Have you tried redownloading the pack?

• Not Applicable / Yes, I have tried downloading a new instance.

Computer OS

Windows 10

Modpack Version Used

0.12.8

Minecraft Environment

Singleplayer

Side Crashed

Server

New Worlds

Yes

Please provide a link to your latest.log, if relevant

TerraFirmaGreg-Modern crashed. The logs have been uploaded to mclo.gs: ### latest.log | hs_err_pid9556.log | CurseForge: launcher_log.txt | KubeJS: client.log / server.log / startup.log | crash_assistant_app.log | modlist.txt | win_event1779897893088.txt java # Problematic frame: # V [jvm.dll+0x31d75c] ansi Found 1 log analysis results: Jvm in: hs_err_pid9556.log ### Mod list changes on top of the modpack: ansi Mod list was not modified.

Steps to Reproduce

-launch tfg on curseforge
-create or join already created singleplayer world
-play or wait for anywhere from a few seconds to ~5 minutes
-the game crashes

Additional Information

no real pattern (atleast nothing i could reliably reproduce) the things i have done to trigger this crash include:
-standing still
-getting killed by a bear
-another player joining the world per LAN using the e4mc mod
-me joining another player using the same mod
-opening my inventory

[Pyritie]

Could not find parent net/minecraft/world/level/saveddata/SavedData for class com/lowdragmc/lowdraglib/async/AsyncThreadData in classloader jdk.internal.loader.ClassLoaders$AppClassLoader@60f82f98 on thread Thread[ForkJoinPool.commonPool-worker-7,10,main]
[18:04:33] [ForkJoinPool.commonPool-worker-7/ERROR]: An error occurred building event handler
java.lang.ClassNotFoundException: net.minecraft.world.level.saveddata.SavedData

I've not seen this error before, do you have java 17 or 25 installed? can you try a different launcher?

[50-Shades-of-Uganda]

i do have java 17 installed, as for different launcher i can try prism. i will report back after trying

[50-Shades-of-Uganda]

i dont seem to have any problems on prism launcher, so might be a problem exclusive to curseforge

[Pyritie]

ok thanks - I don't know if something changed with curseforge recently, but the error looks like it's coming from a gregtech library (ldlib) that's getting removed soon anyway. So hopefully this crash will go away whenever that happens