IndexError

Level 1 of the Dungeon
[Shop] Ininakh's Distillery
  a potion of moonshine (unknown) (11 gold)
  a potion of curing (33 gold)
  a potion of curing (33 gold)
  a potion of lignification (unknown) (33 gold)
  a potion of heal wounds (unknown) (55 gold)
  a potion of moonshine (unknown) (11 gold)
  a potion of invisibility (unknown) (88 gold)
(0, 0, D:1)
  a +0 hand axe
(1, -13, D:1)
  a granite talisman
(3, -5, D:1)
  a ball python skeleton
(4, -9, D:1)
  3 stones
(5, 0, D:1)
  5 stones
(7, 1, D:1)
  a +0 dagger
  a goblin skeleton
(8, 1, D:1)
  a rat skeleton
(9, 2, D:1)
  a +0 short sword
  a kobold skeleton
(10, 14, D:1)
  8 stones
(12, 14, D:1)
  a +0 short sword
(13, 7, D:1)
  a hobgoblin skeleton
(13, 14, D:1)
  a +0 leather armour
(14, -9, D:1)
  a +0 dagger
(16, 15, D:1)
  5 stones
(18, -1, D:1)
  a bat corpse (skeletalised by now)
(19, -10, D:1)
  a +0 robe
(27, 20, D:1)
  7 stones
(31, 5, D:1)
  a bat skeleton
(32, -14, D:1)
  a +0 falchion
(33, -8, D:1)
  a +0 spear
(33, 3, D:1)
  a frilled lizard skeleton
(38, 2, D:1)
  a ball python skeleton
(46, -9, D:1)
  an adder corpse (skeletalised by now)
(49, 17, D:1)
  3 stones

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 dagger
(1, -13, D:2)
  a +0 ring mail
(4, -16, D:2)
  a +0 club
  a +0 buckler
  a kobold corpse
(4, -5, D:2)
  a +0 dagger
(6, -20, D:2)
  a +0 club
(6, -15, D:2)
  a +0 club
(6, 0, D:2)
  2 stones
(6, 7, D:2)
  a quokka corpse (skeletalised by now)
(7, -15, D:2)
  a jackal corpse
  a jackal corpse
(7, -2, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(9, -15, D:2)
  a hobgoblin corpse
(13, 17, D:2)
  a +0 whip
  2 stones
  a kobold corpse (skeletalised by now)
(18, 13, D:2)
  5 boomerangs
(29, -13, D:2)
  a +0 leather armour
(39, -12, D:2)
  a bat corpse
(41, -11, D:2)
  8 gold pieces
  a +0 dagger
  a +0 short sword
  a +0 spear
  a +0 dagger
  a kobold corpse
(41, -10, D:2)
  a +0 dagger
  5 stones
(41, -8, D:2)
  a dart slug corpse
(41, -7, D:2)
  a +0 dagger
(41, -6, D:2)
  2 gold pieces
(41, -5, D:2)
  a scroll of vulnerability
(42, -6, D:2)
  a potion of curing