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1.20.1 Crash upon loading world: 'VirtualChunk' can not be cast to class 'LevelChunk'

imxoon opened this issue ยท 3 comments

commented

Describe the Bug

I was playing on a server alone creating a train and I went to assemble the train, which i had been assembling and disassembling previously, with the only change being made placing a light source (froglights) on the train (I did place this light with a 'FramedBlocks' mod block, not sure if that had anything to do with it). When I clicked assemble, I was immediately kicked from the server and sent to the desktop with the minecraft launcher showing the following message:

The game crashed whilst unexpected error
Error: java.lang.ClassCastException: class com.jozufozu.flywheel.core.virtual.VirtualChunk cannot be cast to class net.minecraft.world.level.chunk.LevelChunk (com.jozufozu.flywheel.core.virtual.VirtualChunk is in module [email protected] of loader 'TRANSFORMER' @44dc7b7d; net.minecraft.world.level.chunk.LevelChunk is in module [email protected] of loader 'TRANSFORMER' @44dc7b7d)

I can no longer get back onto the server as it crashes every time I join. I'm also unsure if this is a problem for the other server members. I had heard of some solutions such as reverting to an older version of minecraft, but I have not tried this as it would require a fair amount of effort to change the forge and mod versions both server-side and client-side for all the players.

Full crash report linked below.

Reproduction Steps

  1. Click "assemble" on the train station interface

Expected Result

  1. Immediate client-side crash
  2. Attempt to rejoin
  3. Crashes before world even loads
  4. Cannot rejoin

Screenshots and Videos

No response

Crash Report or Log

https://gist.github.com/imxoon/44ce8a2c79c4604d6b4e1ccf87709f29#file-gistfile1-txt

Operating System

macOS

Mod Version

0.5.1d

Minecraft Version

1.20.1

Forge Version

1.20.1 - 47.1.0

Other Mods

  • Aquaculture-1.20.1-2.5.0
  • FarmersDelight-1.20.1-1.2.2a
  • FramedBlocks-9.0.3
  • SereneSeasons-1.20.1-9.0.0.43

Additional Context

No response

commented

I only found one other person who had a similar problem, they had a lot more mods in use though.
#3851

commented

i suspect the issue is caused by framedblocks. maybe create is not compatible with it.

commented

That's what I thought at first as well, however, I had used framedblocks to create the entire train, assemble it, and used it. The problem only happened after I added lighting to the train.