Bug Description

When mixin.perf.worldgen_allocation is enabled, using AlexsCaves ConversionCrucibleBlock could cause a crash
Only crash when game is running on a dedicated server, do not crash on client or local game.

The worldgen_allocation option made
public net.minecraft.world.level.levelgen.SurfaceRules$Context m_189576_(IIIIII)V # updateY in accesstransformers.cfg not work

Reproduction Steps

Start a dedicated server with alex caves installed, and mixin.perf.worldgen_allocation enabled
Place a Conversion Crucible Block
Right click on the Conversion Crucible Block with a Biome Treat
Crash

Log File

https://mclo.gs/2kCqhiI

Good catch, thanks; I'll push another 1.20.1 release shortly if there are no other reported issues in the next day or so.