---- Minecraft Crash Report ----
// But it works on my machine.

Time: 5/2/17 9:32 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at j.a(SourceFile:64)
	at my.a(SourceFile:74)
	at my.<init>(SourceFile:66)
	at nt.b(SourceFile:162)
	at cgc.a(SourceFile:98)
	at cgc.j(SourceFile:130)
	at net.minecraft.server.MinecraftServer.run(SourceFile:436)
	at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 17w17b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_131, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 206357048 bytes (196 MB) / 332136448 bytes (316 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	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.