List index out of range

[gimpycoder]

I generated a sparse world and headed south. I found an area on the map where there were no blocking tiles and so I went that direction thinking that I might go into another area (brand new to this game). Upon doing so, the game crashed out with the following trace:

Traceback (most recent call last):
File "reactor-3.py", line 373, in
loop()
File "reactor-3.py", line 290, in loop
main()
File "reactor-3.py", line 217, in main
if logic.tick_all_objects(ignore_tickrate=True):
File "/Reactor-3-master/logic.py", line 79, in tick_all_objects
life.tick_all_life()
File "/Reactor-3-master/life.py", line 1911, in tick_all_life
perform_action(life)
File "/Reactor-3-master/life.py", line 1304, in perform_action
if tuple(_action['to']) == tuple(life['pos']) or walk(life, to=_action['to']):
File "/Reactor-3-master/life.py", line 1115, in walk
_zone = can_walk_to(life, to)
File "/Reactor-3-master/life.py", line 1011, in can_walk_to
_z2 = zones.get_zone_at_coords(pos)
File "/Reactor-3-master/zones.py", line 168, in get_zone_at_coords
_map_pos = WORLD_INFO['map'][pos[0]][pos[1]][pos[2]]
IndexError: list index out of range
[14:52:43 04/28/14-DEBUG] ChunkHandler thread shutting down.

[gimpycoder]

I reloaded the game and went to the same area. To reproduce requires a diagonal movement (I used numpad 3) in south east direction. This is what causes the overflow.