Failed to read from "..." Expected a string, got null

[meelock]

Describe the bug

Occasionally my game gets a strange form of corruption where a map fails to load and gets regenerated with a different variant, destroying everything there. This has happened twice in two different games. The massive log is below.

Attach save file

!Rifle-trimmed.tar.gz

Steps to reproduce

1. Load game
2. Try to gateway using ] -> N to Home
3. Home is corrupted.

Expected behavior

I would expect a proper loading of my home location.

Screenshots

No response

Versions and configuration

• OS: Windows
  • OS Version: 10.0.19045.4529 (22H2)
• Game Version: f45ceda [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [ Dark Days Ahead [dda], Disable NPC Needs [no_npc_food], Portal Storms Ignore NPCs [personal_portal_storms], Slowdown Fungal Growth [no_fungal_growth], Aftershock [aftershock], Arcana and Magic Items [Arcana], Cataclysm++ [Cata++], Secronom [secronom], Secronom+ Lore Expansion [secronom_lore_expansion], Bionic Professions [package_bionic_professions], Magiclysm [magiclysm], Mind Over Matter [mindovermatter], Xedra Evolved [xedra_evolved], Medieval Mod Reborn [Medieval_Mod_Reborn], MST Extra [MST_Extra], Arcana/Cata++ Patchmod [Arcana_Cata++_Patch], Arcana/Aftershock Patchmod [Arcana_aftershock_Patch], Arcana/Magiclysm Patchmod [Arcana_Magiclysm_Patch], Lighter Weariness [light_weariness], Mythical Martial Arts [MMA], Mythical Martial Arts - Mods Extension [MMA_Mods_Extension], Vampiric Stuff [vamp_stuff], Vampiric Stuff + Arcana Mod Extension [vamp_stuff+arcana], Dorf Life [Dorf_Life], Tankmod: Revived [Tankmod_Revived], Blazemod - Vehicle Additions Pack [blazemod], Miscellaneous Magiclysm Expansions [demon_spider_a], No Bionic Slots [no_cbm_slots], SpeedyDex [speedydex], Stats Through Kills [stats_through_kills], Translate Complex Dialogue [translate_dialogue], Railroads [railroads], Extra Mutated Scenarios [extra_mut_scens], Bombastic Perks [bombastic_perks] ]

Additional context

Corruption.txt

[meelock]

May be a variant of https://github.com/CleverRaven/Cataclysm-DDA/issues/71859

[Fosheze]

/confirmed

I have been getting this error repeatedly. My game info is below. I'll see if I can replicate it with no mods in use later.

• OS: Windows
  • OS Version: 10.0.19045.4529 (22H2)
• Game Version: cdda-experimental-2024-07-04-1645 bf080d9 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [ Dark Days Ahead [dda], Disable NPC Needs [no_npc_food], Slowdown Fungal Growth [no_fungal_growth], Bionic Professions [package_bionic_professions], Tamable Wildlife [Tamable_Wildlife], Magiclysm [magiclysm], Mind Over Matter [mindovermatter], DinoMod [DinoMod], Portal Storms Ignore NPCs [personal_portal_storms] ]

[Fosheze]

I just verified it with only DDA loaded. Steps to reproduce:

1. Find and approach a bridge minefield. (it works with best with this map extra but I have seen it with other extras as well)
2. Travel several overmap tiles away so the minefield unloads. (I just debug teleported around for a bit)
3. Re-approach the initial bridge minefield on foot. (teleporting may trigger the error too but I didn't try it)
4. Observe error mentioned above and the map extra being partially changed to a different one.
5. If the map extra didn't change and no error was encountered then try repeating the above steps.

[meelock]

Secondary message that occurs after the first: DEBUG : submap (1266,-106,-1) was already loaded

FUNCTION : deserialize FILE : D:\a\Cataclysm-DDA\Cataclysm-DDA\src\mapbuffer.cpp LINE : 329 VERSION : bf080d9

[Dragmire2]

I have also been getting this repeatedly in the last two days, across different saves. Usually at my base. After passing the error large chunks of my base will be gone.

[meelock]

Closed via https://github.com/CleverRaven/Cataclysm-DDA/commit/973f6a9b57d456fb97e9070391940ffeb762de66