IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 leather armour
(7, -11, D:1)
  a +0 club
(7, -4, D:1)
  a +0 club
(15, -7, D:1)
  5 stones
  a +0 short sword
(25, 20, D:1)
  a +0 dagger
(29, 18, D:1)
  a +0 club
(30, 18, D:1)
  a +0 club
(38, 25, D:1)
  a +0 dagger

Level 2 of the Dungeon
[Shop] Ilexirr's Antique Weapon Shoppe
  a +0 long sword (70 gold)
  a +0 mace (60 gold)
  the +1 rapier of Inference {pain, Stlth+} (496 gold)
    Stlth:     It makes you more stealthy.
  a +0 short sword (60 gold)
  a +0 dagger (40 gold)
  a +0 mace (60 gold)
  the +5 trident "Posizeu" {freeze, Str+4} (934 gold)
    Str:       It affects your strength (+4).
(0, 0, D:2)
  a +0 hand axe
(9, 5, D:2)
  a +0 club
(10, 7, D:2)
  5 stones
  a +0 club
(18, -12, D:2)
  a +0 dagger
(19, -10, D:2)
  a +0 short sword
(21, 7, D:2)
  a hobgoblin corpse (skeletalised by now)
(26, -13, D:2)
  a +0 dagger
  a +0 club
  a kobold corpse (skeletalised by now)
  a goblin corpse (skeletalised by now)
(35, -16, D:2)
  a bat skeleton
(38, -15, D:2)
  a +1 dagger of electrocution
  a goblin corpse
  a jackal corpse
(40, -4, D:2)
  a +0 club
(41, -16, D:2)
  a +0 ring mail
(41, -14, D:2)
  a dart slug corpse
(43, -11, D:2)
  a +0 hand axe
  an orc corpse
(52, -21, D:2)
  a +0 trident
(52, -19, D:2)
  a worm corpse

Level 3 of the Dungeon
(0, 0, D:3)
  a ball python corpse