I attempted to install Forge 1.8.9 but as the title states it throws exceptions upon launch. I downloaded and tried both (standard and windows) recommended 1.8.9 Forge installers with the same results. I have added no mods or made any other changes to the forge profile. Maybe there's something obvious I've missed, but I am not an experienced Forge user and normally play vanilla. Any assistance would be highly appreciated!

 

Below is the Game Output from the failed launch. I'm not sure if there is more information available that I can supply but please let me know if there's more I can provide. Thanks!

 

 

2016-03-22 10:18:30,637 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream

2016-03-22 10:18:30,639 WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream

[10:18:30] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker

[10:18:30] [main/INFO] [FML]: Forge Mod Loader version 11.15.1.1722 for Minecraft 1.8.9 loading

[10:18:30] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_25, running on Windows 7:amd64:6.1, installed at C:\Minecraft\runtime\jre-x64\1.8.0_25

[10:18:30] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine-1.8_HD_U_D2.jar

[10:18:30] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker

[10:18:30] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker

[10:18:30] [main/INFO] [sTDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: acceptOptions

[10:18:30] [main/INFO] [sTDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: injectIntoClassLoader

[10:18:30] [main/INFO] [sTDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ClassTransformer

[10:18:30] [main/INFO] [sTDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine URL: file:/C:/Users/Lodey/AppData/Roaming/.minecraft/mods/OptiFine-1.8_HD_U_D2.jar

[10:18:30] [main/INFO] [sTDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ZIP file: java.util.zip.ZipFile@27f723

[10:18:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper

[10:18:31] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc

[10:18:31] [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing

[10:18:31] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper

[10:18:31] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker

[10:18:32] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker

[10:18:32] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker

[10:18:32] [main/INFO] [sTDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: getLaunchArguments

[10:18:32] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}

[10:18:32] [main/ERROR] [LaunchWrapper]: Unable to launch

java.lang.reflect.InvocationTargetException

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_25]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]

at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

Caused by: java.lang.VerifyError: Catch type is not a subclass of Throwable in exception handler 115

Exception Details:

  Location:

    net/minecraft/client/Minecraft.func_99999_d()V @115: astore_1

  Reason:

    Type 'net/minecraft/util/ReportedException' (constant pool 578) is not assignable to 'java/lang/Throwable'

  Bytecode:

    0x0000000: 2a04 b501 662a b702 45a7 001e 4c2b 1302

    0x0000010: 47b8 024d 4d2c 1302 4fb6 0253 572a 2a2c

    0x0000020: b602 57b6 025b b12a b401 6699 0039 2ab4

    0x0000030: 025d 9900 0a2a b402 5fc7 0020 2ab7 0262

    0x0000040: a7ff e74c 2ab6 0265 2abb 0267 59b7 0268

    0x0000050: b602 6cb8 026f a7ff d12a 2ab4 025f b602

    0x0000060: 5ba7 ffc6 2ab6 0272 a700 684c 2ab6 0272

    0x0000070: a700 614c 2a2b b602 76b6 0257 572a b602

    0x0000080: 65b2 01df 1302 782b b902 7c03 002a 2bb6

    0x0000090: 0276 b602 5b2a b602 72a7 0038 4c2a bb02

    0x00000a0: 4959 1302 7e2b b702 80b6 0257 4d2a b602

    0x00000b0: 65b2 01df 1302 822b b902 7c03 002a 2cb6

    0x00000c0: 025b 2ab6 0272 a700 0b4e 2ab6 0272 2dbf

    0x00000d0: b1b1                                 

  Exception Handler Table:

    bci [5, 9] => handler: 12

    bci [60, 64] => handler: 67

    bci [39, 100] => handler: 107

    bci [39, 100] => handler: 115

    bci [39, 100] => handler: 156

    bci [39, 100] => handler: 201

    bci [107, 108] => handler: 201

    bci [115, 149] => handler: 201

    bci [156, 194] => handler: 201

    bci [201, 202] => handler: 201

  Stackmap Table:

    same_locals_1_stack_item_frame(@12,Object[#572])

    same_frame(@39)

    same_frame(@60)

    same_locals_1_stack_item_frame(@67,Object[#574])

    same_frame(@89)

    same_frame(@100)

    same_locals_1_stack_item_frame(@107,Object[#576])

    same_locals_1_stack_item_frame(@115,Object[#578])

    same_locals_1_stack_item_frame(@156,Object[#572])

    same_locals_1_stack_item_frame(@201,Object[#572])

    same_frame(@208)

    same_frame(@209)

 

at net.minecraft.client.main.Main.main(SourceFile:41) ~[Main.class:?]

... 6 more

Exception in thread "main" [10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:30)

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.Runtime.exit(Runtime.java:107)

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.System.exit(System.java:968)

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)

[10:18:32] [main/INFO] [sTDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

 

I noticed that it did make some mention of an optifine forgetweaker, but I'm not sure where it's getting it from... How would I get rid of it? Remove every profile that might have optifine installed? That seems a bit drastic.

Hm, I see. I didn't realize that Forge used a universal mods folder. That doesn't seem ideal. Regardless, that seems to have done the trick. I figured it must have been something simple that I overlooked. Thank you very much for the help!

Just to clarify for anyone reading this later, I realized that the forge installer had put itself in the .minecraft root directory and was therefor getting files from very old versions, circa 2013/2014. I've put the forge profile in its own folder now and the problems have been resolved.