[1.18 Pre-Release-1] World Crashes with "Cannot invoke "ddm.a(cao, cps, java.util.Random, gh)" when attempting to save a chunk during generation

[Summary]

SMP Server crashes with an NPE while attempting to save a specific chunk that is being generated. I was able to workaround the issue by using MCA Selector to reset the chunk in question (-12,46) which allowed the world to continue on.

java.lang.NullPointerException: Cannot invoke "ddm.a(cao, cps, java.util.Random, gh)" because the return value of "java.util.function.Supplier.get()" is null
    at dbi.a(SourceFile:75)
    at dem.a(SourceFile:88)
    at dem.a(SourceFile:84)
    at dev.a(SourceFile:62)
    at cps.a(SourceFile:259)
    at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:422)
    at cps.a(SourceFile:258)
    at cpu.c(SourceFile:134)
    at cpu.a(SourceFile:274)
    at acp.a(SourceFile:627)
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
    at acp.a(SourceFile:621)
    at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146)
    at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
    at acr.b(SourceFile:58)
    at aud.g(SourceFile:91)
    at aud.a(SourceFile:146)
    at aud.run(SourceFile:102)
    at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
    at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
    at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
    at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

[To Reproduce]

In Singleplayer:

• Load an MC 1.18-pre1 Java client

• Take the BrokenChunkWorld.zip file, extract into %appdata% > .minecraft > saves

• Open the BrokenChunkWorld world, titled "worldgenupdate" in a single player session

• TP to 31, 70, 660 in-game coords and let the world crash

In SMP

• Take BrokenChunkWorld.zip file > extract into %smpserver%

• Modify the server.properties file to point to the BrokenChunkWorld folder

• Start an MC 1.18-pre1 server.jar client on localhost or remote server which has port 25565 open

• Connect to the SMP server

• TP to 31, 70, 660 in-game coords and let the world crash

[Logs]

I've attached both crash reports from my SMP server, where the problem originated, as well as the single player client that I was able to reproduce it within.