java.lang.IllegalArgumentException: Command /f cannot be alias for itself
	at org.apache.commons.lang.Validate.isTrue(Validate.java:157)
	at org.bukkit.craftbukkit.v1_7_R1.help.CommandAliasHelpTopic.<init>(CommandAliasHelpTopic.java:18)
	at org.bukkit.craftbukkit.v1_7_R1.help.SimpleHelpMap.initializeCommands(SimpleHelpMap.java:138)
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:385)
	at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:342)
	at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:319)
	at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:275)
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:175)
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424)
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)