Game crashes when entering End

After entering End portal, whole game crashes.

Description: Exception ticking world

java.lang.IllegalArgumentException: bound must be positive
	at java.util.Random.nextInt(Unknown Source)
	at axz.a(SourceFile:196)
	at axz.a(SourceFile:98)
	at tc.i_(SourceFile:196)
	at net.minecraft.server.MinecraftServer.w(SourceFile:690)
	at net.minecraft.server.MinecraftServer.v(SourceFile:623)
	at dft.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)