```
2017-07-18 21:15:53: ACTION[Server]: b leaves game. List of players: a
2017-07-18 21:15:53: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:53: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:53: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:53: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:53: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead
2017-07-18 21:15:54: ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: Runtime error from mod 'vehicles' in callback luaentity_Step(): /home/zaoqi/.minetest/mods/vehicles/init.lua:49: attempt to index local 'dir' (a nil value)
2017-07-18 21:15:54: ERROR[Main]: stack traceback:
2017-07-18 21:15:54: ERROR[Main]: /home/zaoqi/.minetest/mods/vehicles/init.lua:49: in function </home/zaoqi/.minetest/mods/vehicles/init.lua:39>
2017-07-18 21:15:54: ACTION[Server]: a leaves game. List of players:
```
```
2017-07-15 15:50:11: ACTION[Server]: singleplayer [127.0.0.1] joins game.
2017-07-15 15:50:11: ACTION[Server]: singleplayer joins game. List of players: singleplayer
2017-07-15 15:50:13: ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: Runtime error from mod 'vehicles' in callback luaentity_Step(): .../vehicles/init.lua:44: attempt to index local 'player' (a nil value)
2017-07-15 15:50:13: ERROR[Main]: stack traceback:
2017-07-15 15:50:13: ERROR[Main]: .../vehicles/init.lua:44: in function <.../vehicles/init.lua:39>
```