IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 chain mail
(2, 2, D:1)
  a +0 dagger
(2, 5, D:1)
  a bat corpse
(29, -3, D:1)
  a frilled lizard corpse
  a ball python corpse
(29, -2, D:1)
  a bat corpse
(30, -4, D:1)
  a rat corpse