Jun 16, 2016 10:39:26 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using tweak class name net.minecraft.launchwrapper.VanillaTweaker
Jun 16, 2016 10:39:26 PM net.minecraft.launchwrapper.LogWrapper log
SEVERE: Unable to launch
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:344)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:53)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:18)
Caused by: java.lang.RuntimeException: java.lang.SecurityException: class "bkf"'s signer information does not match signer information of other classes in the same package
	at org.objectweb.asm.ClassWriter.getCommonSuperClass(Unknown Source)
	at org.objectweb.asm.ClassWriter.a(Unknown Source)
	at org.objectweb.asm.Frame.a(Unknown Source)
	at org.objectweb.asm.Frame.a(Unknown Source)
	at org.objectweb.asm.MethodWriter.visitMaxs(Unknown Source)
	at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
	at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
	at org.objectweb.asm.tree.ClassNode.accept(Unknown Source)
	at net.minecraft.launchwrapper.injector.VanillaTweakInjector.transform(VanillaTweakInjector.java:85)
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:267)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:165)
	... 6 more

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0