2013-05-30 17:15:06 [SEVERE] Encountered an unexpected exception NoClassDefFoundError
java.lang.NoClassDefFoundError: l
	at a.<init>(CrashReport.java:27)
	at a.a(CrashReport.java:319)
	at lq.d(Entity.java:1548)
	at lq.c(Entity.java:1472)
	at aam.a(AnvilChunkLoader.java:287)
	at aam.a(AnvilChunkLoader.java:127)
	at im.b(ChunkProviderServer.java:232)
	at im.a(ChunkProviderServer.java:284)
	at in.a(WorldServer.java:844)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:373)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:605)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
	at fy.run(SourceFile:849)
Caused by: java.lang.ClassNotFoundException: l
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:185)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	... 13 more
Caused by: java.lang.OutOfMemoryError: Java heap space
2013-05-30 17:15:11 [INFO] Stopping server
2013-05-30 17:15:11 [INFO] Saving players