Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at net.minecraft.client.multiplayer.PlayerControllerMP.func_78750_j(PlayerControllerMP.java:363)
	at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:336)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1665)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1055)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
	at net.minecraft.client.main.Main.main(SourceFile:124)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)