MC CRASH

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 3/27/15 6:12 PM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityClientPlayerMP
    at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
    at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:515)
    at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:319)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:170)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:620)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityClientPlayerMP
    at inminecraftrpg.InMinecraftRpg.preInit(InMinecraftRpg.java:100)
    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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
    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 com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
    at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:513)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityClientPlayerMP
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 32 more
Caused by: java.lang.NullPointerException
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 34 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Linux (amd64) version 2.6.32-5-amd64
    Java Version: 1.8.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 271483480 bytes (258 MB) / 615514112 bytes (587 MB) up to 1864368128 bytes (1778 MB)
    JVM Flags: 2 total; -Xmx2000M -Xms128M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: ~~ERROR~~ NullPointerException: null
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'cauldron,craftbukkit,mcpc,fml,forge'
    Type: Dedicated Server (map_server.txt)