I was playing with the features of 1.11. I placed down a shulker box from creative. When I opened it everything was fine, but when I closed it, it crashed my game. Here is the game output.

Completely ignored arguments: [--nativeLauncherVersion, 307]
[16:37:46] [Client thread/INFO]: Setting user: Enderhack407
[16:37:48] [Client thread/WARN]: Skipping bad option: lastServer:
[16:37:48] [Client thread/INFO]: LWJGL Version: 2.9.4
[16:37:48] [Client thread/INFO]: Reloading ResourceManager: Default
[16:37:49] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:37:49] [Thread-5/INFO]: Initializing LWJGL OpenAL
[16:37:49] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[16:37:49] [Thread-5/INFO]: OpenAL initialized.
[16:37:50] [Sound Library Loader/INFO]: Sound engine started
[16:37:53] [Client thread/INFO]: Created: 1024x512 textures-atlas
[16:38:01] [Server thread/INFO]: Starting integrated minecraft server version 16w41a
[16:38:01] [Server thread/INFO]: Generating keypair
[16:38:01] [Server thread/INFO]: Preparing start region for level 0
[16:38:01] [Server thread/INFO]: Changing view distance to 16, from 10
[16:38:02] [Server thread/INFO]: Enderhack407[local:E:fa25a1fc] logged in with entity id 20 at (390.15732265049144, 4.0, 220.9592596355585)
[16:38:02] [Server thread/INFO]: Enderhack407 joined the game
[16:38:03] [Server thread/INFO]: Saving and pausing game...
[16:38:03] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
[16:38:03] [Server thread/INFO]: Saving chunks for level 'New World'/Nether
[16:38:03] [Server thread/INFO]: Saving chunks for level 'New World'/The End
[16:38:05] [Server thread/INFO]: Enderhack407 has just earned the achievement [Taking Inventory]
[16:38:05] [Client thread/INFO]: [CHAT] Enderhack407 has just earned the achievement [Taking Inventory]
[16:38:20] [Thread-5/ERROR]: Error in class 'CodecJOrbis'
[16:38:20] [Thread-5/ERROR]: Ogg header not recognized in method 'readHeader'.
[16:38:20] [Thread-5/ERROR]: Error in class 'CodecJOrbis'
[16:38:20] [Thread-5/ERROR]: Error reading the header