[MC-57225] Server Shutdown and/or Crash

Server does a shutdown and it does not generated a crash report only thing in the log is this. Tested on both Windows 8 and Ubuntu linux.

[11:53:08] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: Could not initialize class b
	at net.minecraft.server.MinecraftServer.w(SourceFile:580) ~[minecraft_server.14w25a.jar:?]
	at nt.w(SourceFile:284) ~[minecraft_server.14w25a.jar:?]
	at net.minecraft.server.MinecraftServer.v(SourceFile:506) ~[minecraft_server.14w25a.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:422) [minecraft_server.14w25a.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_55]
[11:53:08] [Server thread/INFO]: Stopping server
[11:53:08] [Server thread/INFO]: Saving players
[11:53:08] [Server thread/INFO]: Saving worlds
[11:53:08] [Server thread/INFO]: Saving chunks for level 'Saves'/Overworld
[11:53:08] [Server thread/INFO]: Saving chunks for level 'Saves'/Nether
[11:53:08] [Server thread/INFO]: Saving chunks for level 'Saves'/The End