Hi, I have a problem with Forge. I install it, all good, but when I start Minecraft with the profile of Forge, it load, but Minecraft don't start. I see the fml-client-latest and: 
  
[13:54:46] [main/DEBUG] [FML/]: Enabling runtime deobfuscation 
[13:54:46] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin 
[13:54:46] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers 
[13:54:46] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin 
[13:54:46] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin 
[13:54:46] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers 
[13:54:46] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin 
[13:54:46] [main/DEBUG] [FML/]: All fundamental core mods are successfully located 
[13:54:46] [main/DEBUG] [FML/]: Discovering coremods 
[13:54:46] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker 
[13:54:46] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker 
[13:54:46] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker 
[13:54:47] [main/ERROR] [LaunchWrapper/]: Unable to launch 
java.util.ConcurrentModificationException 
	at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20] 
	at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20] 
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?] 
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?] 
  
  
  
What I can do?