[WORKAROUND AVAILABLE] LaunchWrapper fails to start on Java 1.8

[tambry]

Hello!

 

I couldn't find a place to report about the LaunchWrapper problem so I'm reporting it here.

 

Log:

[16:22:22] [main/INFO] [FML/]: Forge Mod Loader version 7.2.205.1099 for Minecraft 1.7.2 loading

[16:22:22] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20-ea, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20

[16:22:22] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\User\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1099\1.7.2-Forge10.12.1.1099-natives-819660286695

[16:22:22] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[16:22:22] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[16:22:22] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[16:22:22] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[16:22:22] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[16:22:22] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[16:22:22] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[16:22:22] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[16:22:22] [main/DEBUG] [FML/]: Discovering coremods

[16:22:22] [main/DEBUG] [FML/]: Examining for coremod candidacy PitchFix.jar

[16:22:22] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[16:22:22] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[16:22:22] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[16:22:22] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20-ea]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20-ea]

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:?]

 

It might be fixed here:

https://github.com/Mojang/LegacyLauncher/commit/347fff7200f4acbe189b2a3710a46a6bb8032c9d

 

But there's sadly no LaunchWrapper 1.10 it seems.

[itrollin98]

Java 8 is still in development and is not guaranteed to work. This is NOT a forge problem, but  is a Java problem. I suggest downgrading to JDK 1.7.

[LexManos]

Try without PitchFix

It should work fine as yes java 8 changed this section of code slightly, but it should still be backwards compatible.

 

[tambry]

Tried without PitchFix. Still crashes.

 

Log:

[13:56:50] [main/INFO] [FML/]: Forge Mod Loader version 7.2.205.1101 for Minecraft 1.7.2 loading

[13:56:50] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20-ea, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20

[13:56:50] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\User\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1101\1.7.2-Forge10.12.1.1101-natives-78488797090723

[13:56:50] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[13:56:50] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[13:56:50] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[13:56:50] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[13:56:50] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[13:56:50] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[13:56:50] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[13:56:50] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[13:56:50] [main/DEBUG] [FML/]: Discovering coremods

[13:56:50] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[13:56:50] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[13:56:50] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[13:56:50] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20-ea]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20-ea]

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:?]

[LexManos]

Where did you get the version of java you installed?

You have a 'early access' build of java which could break quite a few things.

Try using standard java 8 full releases which can be found here:

http://www.oracle.com/technetwork/java/javase/downloads/index.html

[tambry]

Worked with update 5.

Development build is here:

https://jdk8.java.net/download.html

[LexManos]

Thanks, I will test out some of the development builds.

However, as the agreement you agree to when downloading early access states, shit may break

The official releases of Java8 all work fine with Forge/LauncherWrapper.