Basically the title. This doesn't affect any cave biomes. To recreate this you just have to enter "REDApRES" into the seed field and create a new world. After that you can locate and tp/walk to any of the new mountain biomes except Meadow and the world will crash. I tried this on a server and the error was "java.lang.NullPointerException: Cannot invoke "dfw.a(double, double, double)" because "this.a" is null" and the server closed with error code "255".

I understand that technically seed "0" isn't even supposed to be entered but it have worked with all previous versions so I think this crash counts as a bug.

My guess is that this new mountain generation is completely based on the raw seed so there probably won't be any fix for this bug but I am still reporting it because I often use it and I got hope.

Stack trace

crash-2021-09-21_15.04.25-server.txt

Description: Exception generating new chunk

java.lang.NullPointerException: Cannot invoke "dfw.a(double, double, double)" because "this.a" is null
	at dff.a(SourceFile:38)
	at dfi.a(SourceFile:24)
	at dff.a(SourceFile:30)
	at dff.a(SourceFile:13)
	at det.a(SourceFile:27)
	at bze.a(SourceFile:352)
	at crh.a(SourceFile:330)
	at cod.e(SourceFile:98)
	at cod$d.doWork(SourceFile:306)
	at cod.a(SourceFile:256)
	at abj.a(SourceFile:625)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at abj.a(SourceFile:619)
	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 abl.b(SourceFile:58)
	at ask.g(SourceFile:91)
	at ask.a(SourceFile:146)
	at ask.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)