Crashing/quitting while loading the nether, teleports player to the overworld coordinates IN the nether
A player on my server discovered this by having his game crash when he
entered a portal into the nether.
He re-logged and ended up at his overworld coordinates, IN the nether. 8 times the distance away that his portal should have put him. The other players attempted to replicate this, and a group of them springboarded across the nether using this glitch and ended up quite easily at the world border of 30 million, leaving a trail of portals each 8x further away from the last.
I have not found any mention of this glitch so I made this report, and have not tried it myself, but will do so shortly to reproduce it for any questions.
Attached a screenshot of some of the players building at the world border.
Edit:
I tested it myself, hopped into a portal, pressed F4 when the nether began to load and got teleported far into the nether to the overworld's coordinates upon re-logging in.
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Confirmed for 16w21b in singleplayer. Also, no portal seems to be generated in the Nether when using this glitch. I suspect that the player's dimension is set to "Nether" directly after entering the portal, but their coordinates are set when the world has already been loaded. Also affects end portals, but you have to be really fast chrashing your game (I used Alt+F4).
Still in 1.10-pre1

The enviroment is supposed to only contain pc details.

Is this still an issue in the most recent versions (currently that is 1.11.2, or 17w06a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.

Just had this happen on a vanilla 1.11.2 server.

@unknown, 1.11.2 was already marked as affected

this also applies to endportals unfortunatly....

Is this still a issue in the latest version of the game(currently 1.13.1)?
If so, please add it to the affected versions, thanks!