ERROR IRRITANTE

[11:59:45 INFO]: Looking for orphaned versions to clean up...
[11:59:46 INFO]: Client> Set 18, 2015 11:59:46 AM net.minecraft.launchwrapper.Lo
gWrapper log
[11:59:46 INFO]: Client> INFORMAÇÕES: Using tweak class name net.minecraft.lau
nchwrapper.VanillaTweaker
[11:59:46 INFO]: Client> Set 18, 2015 11:59:46 AM net.minecraft.launchwrapper.Lo
gWrapper log
[11:59:46 INFO]: Client> GRAVE: Unable to launch
[11:59:46 INFO]: Client> java.lang.ClassNotFoundException: net.minecraft.client.
Minecraft
[11:59:46 INFO]: Client>        at net.minecraft.launchwrapper.LaunchClassLoader
.findClass(LaunchClassLoader.java:179)
[11:59:46 INFO]: Client>        at java.lang.ClassLoader.loadClass(Unknown Sourc
e)
[11:59:46 INFO]: Client>        at java.lang.ClassLoader.loadClass(Unknown Sourc
e)
[11:59:46 INFO]: Client>        at java.lang.Class.forName0(Native Method)
[11:59:46 INFO]: Client>        at java.lang.Class.forName(Unknown Source)
[11:59:46 INFO]: Client>        at net.minecraft.launchwrapper.Launch.launch(Lau
nch.java:53)
[11:59:46 INFO]: Client>        at net.minecraft.launchwrapper.Launch.main(Launc
h.java:18)
[11:59:46 INFO]: Client> Caused by: java.lang.NullPointerException
[11:59:46 INFO]: Client>        at net.minecraft.launchwrapper.LaunchClassLoader
.findClass(LaunchClassLoader.java:171)
[11:59:46 INFO]: Client>        ... 6 more
[11:59:46 INFO]: Client>
[11:59:46 INFO]: Game ended with no troubles detected (exit code 0)
[11:59:46 INFO]: Following visibility rule and showing launcher as the game has
ended
[11:59:46 INFO]: Looking for old natives & assets to clean up...