[1.7.2] 1.7.2-Forge10.12.0.1034 not loading correctly

[22:33:35] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[22:33:35] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[22:33:35] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker

[22:33:35] [main/INFO] [FML]: Forge Mod Loader version 7.2.125.1034 for Minecraft 1.7.2 loading

[22:33:35] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_31, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_31

[22:33:35] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[22:33:35] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[22:33:35] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[22:33:35] [main/ERROR] [LaunchWrapper]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_31]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_31]

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:?]

Picked up _JAVA_OPTIONS: -Xmx4G -Xms2G

Java HotSpot 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

This is what I get after I try to run Forge on minecraft.

[sOLVED]

Install Java 7

2. Start up the minecraft launcher

3. Go to edit profile

4. Click the checkbox that says Executable

5. Delete the words in that box and paste in this:

C:\Program Files (x86)\Java\Jre7\bin\javaw.exe

[Things to note]

Under "Program Files (x86)" the Java folder should have  both verisons of java 8 (to run normal minecraft) and java 7 (to run the forge)

- When you edit your profile in the minecraft launcher, make sure "C:\Program Files (x86)\Java\Jre7\bin\javaw.exe" is linked up to java 7... Or else it will be on java 8... This causes minecraft to load up, and immediately crash.