Log

[19:08:27] [Server thread/INFO]: Starting minecraft server version 1.7.10
[19:10:21] [Server thread/INFO]: Loading properties
[19:10:21] [Server thread/INFO]: Default game type: SURVIVAL
[19:10:21] [Server thread/INFO]: Generating keypair
[19:10:22] [Server thread/INFO]: Starting Minecraft server on *:25565
[19:11:49] [Server thread/INFO]: Preparing level "world"
[19:11:55] [Server thread/INFO]: Preparing start region for level 0
[19:11:57] [Server thread/INFO]: Preparing spawn area: 0%
[19:11:59] [Server thread/INFO]: Preparing spawn area: 4%
[19:12:00] [Server thread/INFO]: Preparing spawn area: 7%
[19:12:02] [Server thread/INFO]: Preparing spawn area: 21%
[19:12:04] [Server thread/INFO]: Preparing spawn area: 26%
[19:12:05] [Server thread/INFO]: Preparing spawn area: 35%
[19:12:07] [Server thread/INFO]: Preparing spawn area: 44%
[19:12:08] [Server thread/INFO]: Preparing spawn area: 58%
[19:12:10] [Server thread/INFO]: Preparing spawn area: 72%
[19:12:11] [Server thread/INFO]: Preparing spawn area: 90%
[19:12:11] [Server thread/INFO]: Done (21.938s)! For help, type "help" or "?"
[19:12:26] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
	at net.minecraft.profiler.Profiler.func_76320_a(Profiler.java:64) ~[qi.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:546) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]
	... 4 more
Caused by: java.lang.RuntimeException: Attempted to load class bjf for invalid side SERVER
	at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50) ~[custom.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]
	... 4 more
[19:12:26] [Server thread/ERROR]: This crash report has been saved to: /Users/williamtitchener/Desktop/Server/./crash-reports/crash-2016-04-02_19.12.26-server.txt
[19:12:26] [Server thread/INFO]: Stopping server
[19:12:26] [Server thread/INFO]: Saving players
[19:12:26] [Server thread/INFO]: Saving worlds
[19:12:26] [Server thread/INFO]: Saving chunks for level 'world'/Overworld
[19:12:27] [Server thread/INFO]: Saving chunks for level 'world'/Nether
[19:12:27] [Server thread/INFO]: Saving chunks for level 'world'/The End