Minecraft Forums

I play minecraft every day. Today I tried to launch the game and I got this:

Apr 14, 2015 8:48:29 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Apr 14, 2015 8:48:30 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Apr 14, 2015 8:48:30 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 7:amd64:6.1, installed at E:\Program Files (2TB EH)\Minecraft\runtime\jre-x64\1.8.0_25
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.6.4_HD_U_D1.jar
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweaker shadersmodcore.loading.SMCTweaker from ShadersModCore-v2.2.3-mc1.6.4-f965.jar
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweak class name optifine.OptiFineForgeTweaker
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweak class name shadersmodcore.loading.SMCTweaker
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2015-04-14 20:48:30 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-04-14 20:48:30 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.remove(ArrayList.java:865)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

I switched back to the old minecraft launcher. the one that wasn't made by microsoft. LOL that worked perfectly. screw microsoft xD