IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
(1, -14, D:1)
  a +0 short sword
(3, 7, D:1)
  a +0 dagger
  an orc corpse
(3, 11, D:1)
  3 stones
(7, 20, D:1)
  a hobgoblin corpse (skeletalised by now)
(9, -14, D:1)
  a +0 short sword
(11, -15, D:1)
  a +0 dagger
(17, 11, D:1)
  a +0 spear
(19, 17, D:1)
  a +0 hand axe
(34, 1, D:1)
  a +0 short sword
  a kobold corpse (skeletalised by now)

Level 2 of the Dungeon
(0, 0, D:2)
  a book of Misfortune
(10, 4, D:2)
  a +0 short sword
  a +0 ring mail
  a +0 dagger
  an orc corpse
  an orc corpse
(12, 2, D:2)
  a +0 club
  a goblin corpse
(22, -25, D:2)
  an adder corpse
(22, 2, D:2)
  an adder corpse