I decided to play a laggy adventure map, and eventually I decided to quit. My computer is quite fast and my virus scanner found nothing. Upon exiting, I deleted the world. I checked the launcher console at that time, and saw that it was writing many things to the console. I quit Minecraft at that point, and an error was printed into the console.
[17:37:57] [Client thread/INFO]: Stopping!
//Quit the game
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
[17:37:57] [Server thread/INFO]: [@: Set the display objective in slot 'sidebar' to 'Power']
[17:37:57] [Server thread/INFO]: [@: Changing to clear weather]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
[17:37:57] [Server thread/INFO]: [@: Set the display objective in slot 'sidebar' to 'Power']
//Deleted the world
[17:37:57] [Server thread/INFO]: [@: Changing to clear weather]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
[17:37:57] [Server thread/INFO]: [@: Set the display objective in slot 'sidebar' to 'Power']
[17:37:57] [Server thread/INFO]: [@: Changing to clear weather]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: Block placed]
[17:37:57] [Server thread/INFO]: [@: 10 blocks filled]
//Closing Minecraft
AL lib: (EE) alc_cleanup: 1 device not closed
Is this still an issue in the current Minecraft Snapshot 15w46a or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.