Updated to match your JRE version, still works.
Note, this isn’t a me vs you thing, just trying to provide more information to aid in debugging the issue.
[23:39:39] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[23:39:39] [main/INFO] [FML]: Forge Mod Loader version 11.14.4.1577 for Minecraft 1.8 loading
[23:39:39] [main/INFO] [FML]: Java is Java HotSpot™ 64-Bit Server VM, version 1.8.0_66, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_66
[23:39:39] [main/INFO] [FML]: Loading tweaker org.spongepowered.asm.launch.MixinTweaker from spongeforge-1.8-1577-2.1-DEV-915.jar
[23:39:39] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Loading tweak class name org.spongepowered.asm.launch.MixinTweaker
[23:39:39] [main/INFO] [mixin]: SpongePowered MIXIN Subsystem Version=0.4.7 Source=file:/C:/Users/Ryan/AppData/Roaming/.minecraft/mods/spongeforge-1.8-1577-2.1-DEV-915.jar Env=CLIENT
[23:39:39] [main/INFO] [mixin]: Compatibility level set to JAVA_8
[23:39:39] [main/INFO] [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[PREINIT]
[23:39:39] [main/INFO] [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[INIT]
[23:39:39] [main/INFO] [mixin]: Adding new token provider org.spongepowered.mod.SpongeCoremod$TokenProvider to MixinEnvironment[DEFAULT]
[23:39:39] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:39:39] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[23:39:41] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[23:39:41] [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
[23:39:41] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[23:39:41] [main/INFO] [LaunchWrapper]: Calling tweak class org.spongepowered.asm.launch.MixinTweaker
[23:39:41] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[23:39:41] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[23:39:41] [main/INFO] [LaunchWrapper]: Loading tweak class name org.spongepowered.asm.mixin.MixinEnvironment$EnvironmentStateTweaker
[23:39:41] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[23:39:41] [main/INFO] [LaunchWrapper]: Calling tweak class org.spongepowered.asm.mixin.MixinEnvironment$EnvironmentStateTweaker
[23:39:43] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[23:39:44] [Client thread/INFO]: Setting user: ryan_the_leach
[23:39:48] [Client thread/INFO]: LWJGL Version: 2.9.1
[23:39:48] [Client thread/INFO] [STDOUT]: [net.minecraftforge.fml.client.SplashProgress:start:246]: ---- Minecraft Crash Report ----
WARNING: coremods are present:
SpongeCoremod (spongeforge-1.8-1577-2.1-DEV-915.jar)
Contact their authors BEFORE contacting forge
// Ooh. Shiny.
Time: 16/12/15 11:39 PM
Description: Loading screen debug info
This is just a prompt for computer specs to be printed. THIS IS NOT A ERROR
A detailed walkthrough of the error, its code path and all known details is as follows:
– System Details –
Details:
Minecraft Version: 1.8
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_66, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 348983304 bytes (332 MB) / 523501568 bytes (499 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
Loaded coremods (and transformers):
SpongeCoremod (spongeforge-1.8-1577-2.1-DEV-915.jar)
org.spongepowered.mod.asm.transformer.WorldGeneratorTransformer
org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
GL info: ’ Vendor: ‘NVIDIA Corporation’ Version: ‘4.5.0 NVIDIA 353.62’ Renderer: ‘GeForce GTX 460/PCIe/SSE2’
[23:39:48] [Client thread/INFO] [MinecraftForge]: Attempting early MinecraftForge initialization
[23:39:48] [Client thread/INFO] [FML]: MinecraftForge v11.14.4.1577 Initialized
[23:39:48] [Client thread/INFO] [FML]: Replaced 204 ore recipies
[23:39:49] [Client thread/INFO] [MinecraftForge]: Completed early MinecraftForge initialization
[23:39:50] [Client thread/INFO] [Sponge]: Sponge Timings: true - Verbose: false - Interval: 1m - Length: 3m
[23:39:51] [Client thread/INFO] [FML]: Found 0 mods from the command line. Injecting into mod discoverer
[23:39:51] [Client thread/INFO] [FML]: Searching C:\Users\Ryan\AppData\Roaming.minecraft\mods for mods
[23:39:52] [Client thread/INFO] [FML]: Forge Mod Loader has identified 13 mods to load
[23:39:53] [Client thread/INFO] [FML]: Attempting connection with missing mods [mcp, FML, Forge, sponge, CreeperMend, BabyRevenge, ForumCommands, Fuse, GolemFeed, KnockOnWood, RefreshingFlame, SlimeRicochet, SnowReduce] at CLIENT
[23:39:53] [Client thread/INFO] [FML]: Attempting connection with missing mods [mcp, FML, Forge, sponge, CreeperMend, BabyRevenge, ForumCommands, Fuse, GolemFeed, KnockOnWood, RefreshingFlame, SlimeRicochet, SnowReduce] at SERVER
[23:39:53] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:SpongeForge
[23:39:53] [Client thread/INFO] [FML]: Processing ObjectHolder annotations
[23:39:53] [Client thread/INFO] [FML]: Found 384 ObjectHolder annotations
[23:39:53] [Client thread/INFO] [FML]: Identifying ItemStackHolder annotations
[23:39:53] [Client thread/INFO] [FML]: Found 0 ItemStackHolder annotations
[23:39:53] [Client thread/INFO] [FML]: Configured a dormant chunk cache size of 0
[23:39:53] [Forge Version Check/INFO] [ForgeVersionCheck]: [Forge] Starting version check at http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json
[23:39:54] [Forge Version Check/INFO] [ForgeVersionCheck]: [Forge] Found status: AHEAD Target: null
[23:39:55] [Client thread/INFO] [FML]: Applying holder lookups
[23:39:55] [Client thread/INFO] [FML]: Holder lookups applied
[23:39:55] [Client thread/INFO] [FML]: Injecting itemstacks
[23:39:55] [Client thread/INFO] [FML]: Itemstack injection complete
[23:39:55] [Sound Library Loader/INFO]: Starting up SoundSystem…
[23:39:55] [Thread-10/INFO]: Initializing LWJGL OpenAL
[23:39:55] [Thread-10/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[23:39:55] [Thread-10/INFO]: OpenAL initialized.
[23:39:55] [Sound Library Loader/INFO]: Sound engine started
[23:39:56] [Client thread/INFO] [FML]: Max texture size: 16384
[23:39:56] [Client thread/INFO]: Created: 16x16 textures-atlas
[23:39:57] [Client thread/INFO] [FML]: Injecting itemstacks
[23:39:57] [Client thread/INFO] [FML]: Itemstack injection complete
[23:39:57] [Client thread/INFO] [FML]: Forge Mod Loader has successfully loaded 13 mods
[23:39:57] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:SpongeForge
[23:39:57] [Client thread/INFO]: SoundSystem shutting down…
[23:39:57] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
[23:39:57] [Sound Library Loader/INFO]: Starting up SoundSystem…
[23:39:57] [Thread-12/INFO]: Initializing LWJGL OpenAL
[23:39:57] [Thread-12/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[23:39:57] [Thread-12/INFO]: OpenAL initialized.
[23:39:58] [Sound Library Loader/INFO]: Sound engine started
[23:39:58] [Client thread/INFO] [FML]: Max texture size: 16384
[23:39:58] [Client thread/INFO]: Created: 512x512 textures-atlas
[23:40:34] [Server thread/INFO]: Starting integrated minecraft server version 1.8
[23:40:34] [Server thread/INFO]: Generating keypair
[23:40:35] [Server thread/INFO] [FML]: Loading dimension 0 (New World) (net.minecraft.server.integrated.IntegratedServer@69ce2a12)
[23:40:35] [Server thread/INFO] [FML]: Loading dimension 1 (DIM1) (net.minecraft.server.integrated.IntegratedServer@69ce2a12)
[23:40:35] [Server thread/INFO] [FML]: Loading dimension -1 (DIM-1) (net.minecraft.server.integrated.IntegratedServer@69ce2a12)
[23:40:35] [Server thread/INFO]: Preparing start region for level -1
[23:40:36] [Server thread/INFO]: Preparing spawn area: 83%
[23:40:36] [Server thread/INFO]: Preparing start region for level 1
[23:40:36] [Server thread/INFO]: Preparing start region for level 0
[23:40:37] [Server thread/INFO] [Sponge]: Timings Reset