Potential softlock regarding treasure chests

[gensakudan]

When you open a chest with an item while your inventory is full, and you choose to abandon the item, it is lost forever. This extends (but is not limited to) the following one-of-a-kind items:

• Silver Tusk from Skeleton(s) in Iala Cave
• Laconian Sword from Red Dragon in Avion Tower
• Laconian Axe from Medusa in Medusa's Tower
• Frad Mantle from Tajim (not a chest item)
• Shield of Perseus (not a chest item)
• FlowMover in Bartevo (not a chest item, necessary to progress)
• Soothe Flute in Gothic (not a chest item)
• Dungeon Key in Camineet Warehouse (necessary to progress)
• Aeroprism from Golem(s) in unnamed cave on Dezoris (necessary to progress)
• Compass in Medusa's Cave (necessary to progress)
• Governor-General's Letter (not a chest item, necessary to progress)
• Laconian Pot from Nekise (not a chest item, necessary to progress)
• Laconian Pot from Mad Doctor in Avion (necessary to progress)
• Carbuncle Eye from Dragon Wise in Casba Cave (necessary to progress)
• Miracle Key in Baya Malay Tower

Items marked with "not a chest item" may require testing to see if there's any logic accounting for a full inventory.
Items marked with "necessary to progress" will softlock the game if they are lost this way.

The most obvious solution that I can think of would be to not mark a dungeon event as cleared if the item is abandoned, though in the case of monster encounters that drop certain items, that may require the monster to be fought again at a later time in order to get the item. If it's possible to change the encounter event into a regular chest event and have that saved to SRAM, that'd likely be the most ideal solution.

[maxim-zhao]

I'm fairly sure that all enemy item drops are handled the same way; you can just as well choose not to open an important one. I think it would be weird to add dialogue paths like "you have to open this treasure chest" and "you can't abandon this, choose something to discard".

[maxim-zhao]

If your inventory is full, Nekise will keep trying to give you the Laconian Pot.

[maxim-zhao]

Also found this in a walkthrough:

        [Q] I'm stuck in the Dezoris West Cave. What do I do?

        [A] It looks like you've fallen into the notorious "endless" trap. If
            you fell through a trapdoor in that cave, then you're pretty much
            stuck there. Use an Exit spell to get yourself out. If you're out
            of MP, then you're screwed. If you saved while in this trap, then
            you're royally screwed. 
 
            Protip: Don't fall down holes... And don't listen to those filthy
            Dezorian liars.