[💥]: Crashing in singleplayer - tried three different launchers and three different versions of java

[the-gaybee]

Was this crash reported before?

• No, it was not.

Are you using Prism or Curseforge?

No, I am not 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 11

Modpack Version Used

0.12.8

Minecraft Environment

Singleplayer

Side Crashed

Client

New Worlds

Yes

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

https://mclo.gs/ZvYRNwA

Steps to Reproduce

TerraFirmaGreg-Modern crashed. The logs have been uploaded to mclo.gs:

latest.log | hs_err_pid27156.log | atlauncher.log | KubeJS: client.log / server.log / startup.log | crash_assistant_app.log | modlist.txt | i7-13700 might be the reason for the crash

# Problematic frame:
# V  [jvm.dll+0x31d75c]

Found 1 log analysis results:
Jvm in: hs_err_pid27156.log

Mod list changes on top of the modpack:

Removed mods:
ExtremeSoundMuffler-3.51-forge-1.20.1.jar
probejs-6.0.1-forge.jar

Additional Information

This has been occurring for the past two weeks. I have not been able to play for longer than half an hour, usually much less. I started playing this modpack on CurseForge, then when it first crashed, it recommended I update my Java, and with that it recommended using ATLauncher instead. I did both. The crash still happened, and this time I ran the BiOS check and all that and got that patch for the intel core issue. I was playing the latest Java (26) and then tried playing Java 21 to see if that helped. Nope. I started a new save, and while it lasted a big longer, it still crashed and then repeatedly crashed thereafter. There is nothing preempting the crash, no drop in frames, no message about the ram, nothing. I can play at 60 fps and 6144 RAM no problem - until now.

[Pyritie]

#4139 had the same issue and switching to prism seems to have fixed it for them, you could give it a try?

[the-gaybee]

#4139 had the same issue and switching to prism seems to have fixed it for them, you could give it a try?

Tried it, didn't work. Only got to play for 13 minutes before it crashed.

TerraFirmaGreg-Modern crashed. The logs have been uploaded to mclo.gs:

latest.log | debug.log head / tail (~16MB & ~96k lines) | hs_err_pid21020.log | PrismLauncher-0.log | KubeJS: client.log / server.log / startup.log | crash_assistant_app.log | modlist.txt | i7-13700 might be the reason for the crash

# Problematic frame:
# V  [jvm.dll+0x31d75c]

Found 1 log analysis results:
Jvm in: hs_err_pid21020.log

Mod list changes on top of the modpack:

Removed mods:
ExtremeSoundMuffler-3.51-forge-1.20.1.jar
probejs-6.0.1-forge.jar

[Pyritie]

[30May2026 11:00:10.139] [ForkJoinPool.commonPool-worker-5/ERROR] [net.minecraftforge.eventbus.EventSubclassTransformer/EVENTBUS]: Could not find parent net/minecraft/world/level/saveddata/SavedData for class com/gregtechceu/gtceu/api/pattern/MultiblockWorldSavedData in classloader jdk.internal.loader.ClassLoaders$AppClassLoader@6659c656 on thread Thread[ForkJoinPool.commonPool-worker-5,5,SERVER]

as far as I can tell, this is the crash, but it's somewhere inside gregtech's code to do with multiblocks. I have no idea what else could be causing it -- have you built any multiblocks recently? is there anything else in those chunks?

[the-gaybee]

[30May2026 11:00:10.139] [ForkJoinPool.commonPool-worker-5/ERROR] [net.minecraftforge.eventbus.EventSubclassTransformer/EVENTBUS]: Could not find parent net/minecraft/world/level/saveddata/SavedData for class com/gregtechceu/gtceu/api/pattern/MultiblockWorldSavedData in classloader jdk.internal.loader.ClassLoaders$AppClassLoader@6659c656 on thread Thread[ForkJoinPool.commonPool-worker-5,5,SERVER]

as far as I can tell, this is the crash, but it's somewhere inside gregtech's code to do with multiblocks. I have no idea what else could be causing it -- have you built any multiblocks recently? is there anything else in those chunks?

i had built many a multiblock in my various saves, but I've also experienced the crashing in a fresh save with no multiblocks, with the exception of a forge, I guess. I checked my world again (got to play for a whole five minutes this time) and there's two multiblock structures that span more than one chunk, however, I was in a spot where all the chunks were loaded at the same time, and I hadn't even stepped foot outside of them - let alone far enough to unload one. None of them were powered either.

[Pyritie]

sorry, I really don't know then I'm afraid

[shaxsadmail-cell]

Same issue on 0.12.8 starting to crash randomly . And yeah it seem problem appears on 13th gen Intel processors,