---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 13/11/2021, 08:44
Description: Exception in server tick loop

java.util.concurrent.CompletionException: z: Feature placement
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155)
	at java.base/java.util.concurrent.CompletableFuture$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)
Caused by: z: Feature placement
	at acp.a(SourceFile:639)
	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)
	... 11 more
Caused by: 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)
	... 14 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.18 Pre-release 1
	Minecraft Version ID: 1.18-pre1
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 16.0.1, Microsoft
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
	Memory: 1973307712 bytes (1881 MiB) / 4093640704 bytes (3904 MiB) up to 4294967296 bytes (4096 MiB)
	CPUs: 12
	Processor Vendor: GenuineIntel
	Processor Name: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
	Identifier: Intel64 Family 6 Model 158 Stepping 13
	Microarchitecture: Coffee Lake
	Frequency (GHz): 2,59
	Number of physical packages: 1
	Number of physical CPUs: 6
	Number of logical CPUs: 12
	Graphics card #0 name: NVIDIA GeForce GTX 1650 Ti
	Graphics card #0 vendor: NVIDIA (0x10de)
	Graphics card #0 VRAM (MB): 4095,00
	Graphics card #0 deviceId: 0x1f95
	Graphics card #0 versionInfo: DriverVersion=27.21.14.5167
	Graphics card #1 name: Intel(R) UHD Graphics 630
	Graphics card #1 vendor: Intel Corporation (0x8086)
	Graphics card #1 VRAM (MB): 1024,00
	Graphics card #1 deviceId: 0x3e9b
	Graphics card #1 versionInfo: DriverVersion=27.20.100.8280
	Memory slot #0 capacity (MB): 8192,00
	Memory slot #0 clockSpeed (GHz): 3,20
	Memory slot #0 type: DDR4
	Memory slot #1 capacity (MB): 8192,00
	Memory slot #1 clockSpeed (GHz): 3,20
	Memory slot #1 type: DDR4
	Virtual memory max (MB): 21249,50
	Virtual memory used (MB): 19100,11
	Swap memory total (MB): 5028,45
	Swap memory used (MB): 256,34
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 1 / 8; [add['Spectralitree'/42, l='ServerLevel[wowowowowoo]', x=-3879.61, y=86.22, z=2591.55]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Client jar signature and brand is untouched; Server jar signature and brand is untouched