ive set up my eclipse program with jdk and 1.7.2 forge source and all that stuff. and i cannot open the minecraft from eclipse. the error is as follows
[18:03:39] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[18:03:39] [main/INFO]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[18:03:39] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[18:03:39] [main/INFO]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading
[18:03:39] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_20, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20
[18:03:39] [main/INFO]: Managed to load a deobfuscated Minecraft name- we are in a deobfuscated environment. Skipping runtime deobfuscation
[18:03:39] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[18:03:39] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[18:03:39] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[18:03:39] [main/ERROR]: 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:?]
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
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[18:03:39] [main/INFO]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[18:03:39] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[18:03:39] [main/INFO]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading
[18:03:39] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_20, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20
[18:03:39] [main/INFO]: Managed to load a deobfuscated Minecraft name- we are in a deobfuscated environment. Skipping runtime deobfuscation
[18:03:39] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[18:03:39] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[18:03:39] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[18:03:39] [main/ERROR]: 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:?]
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release