Crash/Freeze when logging out of Single player world

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
Completely ignored arguments: [--nativeLauncherVersion, 302]
[11:47:01] [Client thread/INFO]: Setting user: deedee
[11:47:02] [Client thread/INFO]: LWJGL Version: 2.9.2
[11:47:02] [Client thread/INFO]: Reloading ResourceManager: Default
[11:47:02] [Sound Library Loader/INFO]: Starting up SoundSystem...
[11:47:02] [Thread-5/INFO]: Initializing LWJGL OpenAL
[11:47:02] [Thread-5/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
2016-03-02 11:47:02.835 java[3862:1812447] 11:47:02.835 WARNING:  140: This application, or a library it uses, is using the deprecated Carbon Component Manager for hosting Audio Units. Support for this will be removed in a future release. Also, this makes the host incompatible with version 3 audio units. Please transition to the API's in AudioComponent.h.
[11:47:02] [Thread-5/INFO]: OpenAL initialized.
[11:47:03] [Sound Library Loader/INFO]: Sound engine started
[11:47:03] [Client thread/INFO]: Created: 1024x512 textures-atlas
[11:47:12] [Server thread/INFO]: Starting integrated minecraft server version 1.9
[11:47:12] [Server thread/INFO]: Generating keypair
[11:47:12] [Server thread/INFO]: Preparing start region for level 0
[11:47:13] [Server thread/INFO]: Preparing spawn area: 44%
[11:47:13] [Server thread/INFO]: Changing view distance to 7, from 10
[11:47:14] [Server thread/INFO]: deedee[local:E:995245bf] logged in with entity id 413 at (-132.79642638280959, 65.0, 281.1017894279635)
[11:47:14] [Server thread/INFO]: deedee joined the game
[11:47:15] [Server thread/INFO]: Saving and pausing game...
[11:47:15] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
[11:47:15] [Server thread/INFO]: Saving chunks for level 'New World'/Nether
[11:47:15] [Server thread/INFO]: Saving chunks for level 'New World'/The End
[11:47:17] [Server thread/INFO]: Saving and pausing game...
[11:47:17] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
[11:47:17] [Server thread/INFO]: Saving chunks for level 'New World'/Nether
[11:47:17] [Server thread/INFO]: Saving chunks for level 'New World'/The End
[11:47:19] [Client thread/INFO]: Using default channel type
[11:47:19] [Client thread/INFO]: Started on 55409
[11:47:19] [Client thread/INFO]: [CHAT] Local game hosted on port 55409
[11:47:21] [Server thread/INFO]: deedee lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[11:47:21] [Server thread/INFO]: deedee left the game
[11:47:21] [Server thread/INFO]: Stopping singleplayer server as player logged out
[11:47:21] [Server thread/INFO]: Stopping server
[11:47:21] [Server thread/INFO]: Saving players
[11:47:21] [Server thread/INFO]: Saving worlds
[11:47:21] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
[11:47:21] [Server thread/INFO]: Saving chunks for level 'New World'/Nether
[11:47:21] [Server thread/INFO]: Saving chunks for level 'New World'/The End