minecraft crash report

---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 15/02/13 18:51
Description: Initializing game

java.lang.StringIndexOutOfBoundsException: String index out of range: 0
    at java.lang.String.charAt(String.java:646)
    at net.minecraftforge.fml.common.FMLCommonHandler.loadLanguage(FMLCommonHandler.java:739)
    at net.minecraft.client.resources.Locale.func_135021_a(Locale.java:110)
    at net.minecraft.client.resources.Locale.func_135028_a(Locale.java:99)
    at net.minecraft.client.resources.Locale.func_135022_a(Locale.java:45)
    at net.minecraft.client.resources.LanguageManager.func_110549_a(LanguageManager.java:85)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SourceFile:104)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SourceFile:92)
    at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:735)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:238)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:412)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
    at net.minecraft.client.main.Main.main(SourceFile:120)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
    at java.lang.String.charAt(String.java:646)
    at net.minecraftforge.fml.common.FMLCommonHandler.loadLanguage(FMLCommonHandler.java:739)
    at net.minecraft.client.resources.Locale.func_135021_a(Locale.java:110)
    at net.minecraft.client.resources.Locale.func_135028_a(Locale.java:99)
    at net.minecraft.client.resources.Locale.func_135022_a(Locale.java:45)
    at net.minecraft.client.resources.LanguageManager.func_110549_a(LanguageManager.java:85)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SourceFile:104)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SourceFile:92)
    at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:735)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:238)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:412)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
    at net.minecraft.client.main.Main.main(SourceFile:120)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.8
    Operating System: Windows 8.1 (amd64) version 6.3
    Java Version: 1.8.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 138950152 bytes (132 MB) / 250216448 bytes (238 MB) up to 4281597952 bytes (4083 MB)
    JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.10 FML v8.0.29.1310 Minecraft Forge 11.14.1.1310 Optifine OptiFine_1.8_HD_U_B2 3 mods loaded, 3 mods active
    mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
    FML{8.0.29.1310} [Forge Mod Loader] (forge-1.8-11.14.1.1310.jar) Unloaded->Constructed
    Forge{11.14.1.1310} [Minecraft Forge] (forge-1.8-11.14.1.1310.jar) Unloaded->Constructed
    Loaded coremods (and transformers):
    Launched Version: 1.8-Forge11.14.1.1310
    LWJGL: 2.9.1
    OpenGL: Intel(R) HD Graphics 4600 GL version 4.2.0 - Build 10.18.10.3345, Intel
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: No
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: []
    Current Language: ~~ERROR~~ NullPointerException: null
    Profiler Position: N/A (disabled)