IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a rat corpse
(2, -6, D:1)
  a scroll of acquirement
(3, -10, D:1)
  a quokka corpse
(6, -8, D:1)
  a +0 dagger
  5 stones
  a kobold corpse
(18, -8, D:1)
  a stone