IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a rat corpse
(2, -6, D:1)
  a scroll of acquirement
(5, -8, D:1)
  a +0 dagger
  5 stones
(7, -8, D:1)
  a rat corpse
(18, -8, D:1)
  a stone