---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 2018-02-15 16:45
Description: Exception in server tick loop

java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.ClassCastException: axf cannot be cast to azf
	at net.minecraft.server.MinecraftServer.i_(SourceFile:394)
	at cvz.a(SourceFile:115)
	at cvz.d(SourceFile:131)
	at net.minecraft.server.MinecraftServer.run(SourceFile:502)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: java.lang.ClassCastException: axf cannot be cast to azf
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2272)
	at net.minecraft.server.MinecraftServer.i_(SourceFile:392)
	... 4 more
Caused by: java.lang.ClassCastException: axf cannot be cast to azf
	at sc.f(SourceFile:169)
	at bpc$a.a(SourceFile:489)
	at bpl.a(SourceFile:57)
	at bmk.a(SourceFile:86)
	at bok.a(SourceFile:16)
	at bok.a(SourceFile:13)
	at bjc.a(SourceFile:27)
	at aug.a(SourceFile:416)
	at bin.b(SourceFile:123)
	at sk.a(SourceFile:12)
	at sj.a(SourceFile:33)
	at bgz.a(SourceFile:83)
	at so.a(SourceFile:54)
	at so.a(SourceFile:23)
	at zk$a.a(SourceFile:143)
	at zk$a$$Lambda$887/2017308764.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)


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

-- System Details --
Details:
	Minecraft Version: 18w07b
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 57407360 bytes (54 MB) / 251658240 bytes (240 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.