---- Minecraft Crash Report ----
// Sorry :(

Time: 4/20/17 11:51 PM
Description: Exception in server tick loop

com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Unknown loot entity property 'minecraft:profession'
	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2217)
	at com.google.common.cache.LocalCache.get(LocalCache.java:4154)
	at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4158)
	at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5147)
	at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:5153)
	at bes.a(SourceFile:46)
	at bes.a(SourceFile:52)
	at bes.<init>(SourceFile:42)
	at nq.b(SourceFile:161)
	at cfz.a(SourceFile:98)
	at cfz.j(SourceFile:130)
	at net.minecraft.server.MinecraftServer.run(SourceFile:436)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Unknown loot entity property 'minecraft:profession'
	at bfp.a(SourceFile:33)
	at bfk$a.a(SourceFile:63)
	at bfk$a.b(SourceFile:41)
	at bfj$a.a(SourceFile:88)
	at bfj$a.deserialize(SourceFile:76)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69)
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41)
	at com.google.gson.internal.bind.ArrayTypeAdapter.read(ArrayTypeAdapter.java:72)
	at com.google.gson.Gson.fromJson(Gson.java:887)
	at com.google.gson.Gson.fromJson(Gson.java:952)
	at com.google.gson.internal.bind.TreeTypeAdapter$GsonContextImpl.deserialize(TreeTypeAdapter.java:162)
	at qf.a(SourceFile:437)
	at qf.a(SourceFile:453)
	at ben$a.a(SourceFile:76)
	at ben$a.deserialize(SourceFile:71)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69)
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41)
	at com.google.gson.internal.bind.ArrayTypeAdapter.read(ArrayTypeAdapter.java:72)
	at com.google.gson.Gson.fromJson(Gson.java:887)
	at com.google.gson.Gson.fromJson(Gson.java:952)
	at com.google.gson.internal.bind.TreeTypeAdapter$GsonContextImpl.deserialize(TreeTypeAdapter.java:162)
	at qf.a(SourceFile:437)
	at qf.a(SourceFile:453)
	at bep$a.a(SourceFile:119)
	at bep$a.deserialize(SourceFile:115)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69)
	at com.google.gson.Gson.fromJson(Gson.java:887)
	at com.google.gson.Gson.fromJson(Gson.java:852)
	at com.google.gson.Gson.fromJson(Gson.java:801)
	at com.google.gson.Gson.fromJson(Gson.java:773)
	at bes$a.b(SourceFile:96)
	at bes$a.a(SourceFile:64)
	at bes$a.load(SourceFile:56)
	at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3716)
	at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2424)
	at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2298)
	at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2211)
	... 12 more


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

-- System Details --
Details:
	Minecraft Version: 17w16a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1045059240 bytes (996 MB) / 1212981248 bytes (1156 MB) up to 8482586624 bytes (8089 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx8G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn1G
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.