IndexError

Level 1 of the Dungeon
(2, 3, D:1)
  a bat corpse (skeletalised by now)
(4, -6, D:1)
  a +0 short sword
  a kobold corpse (skeletalised by now)
(13, 8, D:1)
  4 stones
(21, 6, D:1)
  a rat skeleton
(21, 13, D:1)
  a +0 ring mail
(32, 11, D:1)
  a quokka skeleton
(34, -13, D:1)
  6 poisoned darts
(42, 20, D:1)
  7 stones
  a +0 leather armour
(43, -8, D:1)
  a ball python skeleton
  a hobgoblin skeleton
(56, 21, D:1)
  a +0 sling

Level 2 of the Dungeon
[Shop] Gigi's Distillery
  2 potions of curing (78 gold)
  a potion of lignification (39 gold)
  a potion of attraction (39 gold)
  a potion of curing (39 gold)
  a potion of might (52 gold)
  a potion of curing (39 gold)
  2 potions of brilliance (104 gold)
(0, 0, D:2)
  a +0 whip
  2 stones
  a kobold skeleton
(4, -5, D:2)
  a +0 flail
  a +0 ring mail
(4, 25, D:2)
  a +0 trident
(6, 19, D:2)
  the felid skeleton of Natasha
(10, 6, D:2)
  3 poisoned darts
(13, 18, D:2)
  a potion of degeneration {!q}
(13, 38, D:2)
  a +0 plate armour
(17, 1, D:2)
  5 poisoned darts
(17, 35, D:2)
  6 stones
(19, 5, D:2)
  a +0 dagger
  an adder skeleton
  a goblin skeleton
(21, 2, D:2)
  a +0 club
(22, -2, D:2)
  a +0 club
  an orc corpse
(22, -1, D:2)
  a +0 club
  a +0 leather armour
  an orc corpse
(28, 0, D:2)
  a ball python skeleton
(31, 23, D:2)
  a +0 plate armour
(32, 4, D:2)
  a +0 club
(34, 24, D:2)
  a hobgoblin corpse (skeletalised by now)
(34, 30, D:2)
  a +0 dagger
  2 stones
(34, 32, D:2)
  a ring of poison resistance {rPois, !d}
(38, -6, D:2)
  a +0 short sword
(47, 21, D:2)
  a ball python corpse (skeletalised by now)
(48, -4, D:2)
  a rat corpse (skeletalised by now)
(48, 5, D:2)
  a frilled lizard skeleton

Level 3 of the Dungeon
(0, 0, D:3)
  a bat corpse
(0, 1, D:3)
  a scroll of noise
(4, 16, D:3)
  a +0 dagger
(9, 2, D:3)
  6 stones
(25, 37, D:3)
  4 stones
(32, 33, D:3)
  an adder corpse