if a player rides a pig an run into lava, the game will crash after the pig dies. This will happen in all 3 Gamemodes in all directions.
I can´t find any special things happen in this moment. It crashes with and without items in your hand, with or without speeding up the pig by rightclick.
The game will crash in every try i made.
Have a nice day... by the way, where are the conectable minecarts?