IndexError

Level 1 of the Dungeon
[Shop] Haplues's Antique Armour Emporium
  the +2 ratskin cloak {*Rats rPois rN+ Str-1 Int-1 Dex+1} (611 gold)
    When the wearer is hurt, rats may emerge from it to assist them.
    
    Str:       It affects your strength (-1).
    Int:       It affects your intelligence (-1).
    Dex:       It affects your dexterity (+1).
    rPois:     It protects you from poison.
    rN:        It protects you from negative energy.
  a +0 ring mail (88 gold)
  a +0 leather armour (44 gold)
  a +0 pair of gloves (99 gold)
  a +0 robe (15 gold)
  a +0 ring mail (88 gold)
  a +0 leather armour (44 gold)
  a +0 pair of gloves (99 gold)
  a +2 chain mail of willpower (473 gold)
  a +0 scale mail (88 gold)
  a +0 robe (15 gold)
  a +0 ring mail (88 gold)
(0, 0, D:1)
  15 stones
(18, 36, D:1)
  a book of Callings
(28, 12, D:1)
  a +0 club
  a +0 dagger
(33, 9, D:1)
  19 poisoned darts
(35, 14, D:1)
  24 arrows
(42, 13, D:1)
  27 stones
(44, 35, D:1)
  24 bolts

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 dagger
(0, 7, D:2)
  2 boomerangs
(0, 42, D:2)
  a +0 club (still there?)
  a goblin corpse (still there?)
(1, 9, D:2)
  a rat corpse (skeletalised by now)
(2, 43, D:2)
  a +0 dagger (still there?)
  a goblin corpse (still there?)
(5, 42, D:2)
  a +0 plate armour
(12, 16, D:2)
  29 stones
(13, 11, D:2)
  a +0 club
(14, 11, D:2)
  a +0 club
(14, 16, D:2)
  25 arrows
(15, 9, D:2)
  a +0 club
(15, 10, D:2)
  a +0 ring mail
  a +0 club
  a +0 dagger
(15, 11, D:2)
  a +0 dagger of speed
(15, 12, D:2)
  a +0 dagger
(18, 39, D:2)
  a +0 club