Crash on autosave (while driving a wheelchair)

[Svankensen]

Describe the bug

In the last few hours have had 2 crashes on autosave. Both happened while driving a wheelchair, so I suspect it may be related. I get a deserialize item error after loading the presumably corrupted save.

Attach save file

Santiago-trimmed.tar.gz

Steps to reproduce

Sadly can't figure out exact steps to reproduce.

Expected behavior

Not to crash

Screenshots

No response

Versions and configuration

• OS: Windows
  • OS Version: 10.0.26200.7462 (25H2)
• Game Version: cdda-experimental-2026-01-01-1802-dirty [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]
  ]

Additional context

crash.log

[Svankensen]

Happened again while riding a bike this time. Almost exact same location as the first crash (outside LMOE shelter). That wasn't the crash I reported and uploaded the save tho.

crash.log

The error on load of the corrupted save is DEBUG : parent location doesn't exist. Item_location has lost its target over a save/load cycle.

REPORTING FUNCTION : deserialize
C++ SOURCE FILE : D:\a\Cataclysm-DDA\Cataclysm-DDA\src\item_location.cpp
LINE : 894
VERSION : cdda-experimental-2026-01-01-1802-dirty

[Zerdocriil]

the same happen to me few time in car, and also while fight, and still happening from time to time

Screenshots

debug.log
crash.log
1-trimmed.tar.gz

• OS: Windows
  • OS Version: 10.0.19045.6456 (22H2)
• Game Version: cdda-experimental-2025-12-31-2136-dirty [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]
  ]

[anoobindisguise]

I also have crashes, at the end of a manual save (I do not use autosave), if I have traveled a long distance causing a lot of data to save. Both with and without save compression. The first crash was in the middle of a farm field, and the second outside the balthazar bunker.

• OS: Windows
  • OS Version: 10.0.19045.6466 (22H2)
• Game Version: cdda-experimental-2026-01-01-2239-dirty [64-bit]
• Graphics Version: Tiles
• Game Language: English [en]
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Slowdown Fungal Growth [no_fungal_growth],
  Bionic Slots [cbm_slots],
  Portal Storms Ignore NPCs [personal_portal_storms],
  Bombastic Perks [bombastic_perks]
  ]

[anoobindisguise]

Oh, I ought to include a crash log... here's one.

crash.log

[alef]

The crash logs says the error happens while autosaving.
The function creating problems is consume_menu_uistate::serialize.

[alef]

It happened right now on my debug session:

cataclysm-tiles.exe!abort() Line 77 (c:\Program Files\Microsoft VS Code Insiders\minkernel\crts\ucrt\src\appcrt\startup\abort.cpp:77)
cataclysm-tiles.exe!signal_handler(int sig) Line 155 (z:\alef\src\crash.cpp:155)
cataclysm-tiles.exe!_seh_filter_exe(unsigned long xcptnum, _EXCEPTION_POINTERS * pxcptinfoptrs) Line 219 (c:\Program Files\Microsoft VS Code Insiders\minkernel\crts\ucrt\src\appcrt\misc\exception_filter.cpp:219)
cataclysm-tiles.exe!`__scrt_common_main_seh'::`1'::filt$0() Line 304 (d:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:304)
cataclysm-tiles.exe!__C_specific_handler(_EXCEPTION_RECORD * ExceptionRecord, void * EstablisherFrame, _CONTEXT * ContextRecord, _DISPATCHER_CONTEXT * DispatcherContext) Line 389 (d:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\riscchandler.cpp:389)
ntdll.dll!00007ffb773662ff() (Unknown Source:0)
ntdll.dll!00007ffb77212327() (Unknown Source:0)
ntdll.dll!00007ffb77365c3e() (Unknown Source:0)
cataclysm-tiles.exe!vehicle::abs_part_pos(const vehicle_part & pt) Line 3739 (z:\alef\src\vehicle.cpp:3739)
cataclysm-tiles.exe!vehicle::abs_part_pos(int index) Line 3734 (z:\alef\src\vehicle.cpp:3734)
cataclysm-tiles.exe!item_location::impl::item_on_vehicle::pos_abs() Line 518 (z:\alef\src\item_location.cpp:518)
cataclysm-tiles.exe!item_location::impl::item_on_vehicle::serialize(JsonOut & js) Line 497 (z:\alef\src\item_location.cpp:497)
[Inline Frame] cataclysm-tiles.exe!JsonOut::write(const item_location &) Line 807 (z:\alef\src\json.h:807)
[Inline Frame] cataclysm-tiles.exe!JsonOut::member(const std::basic_string_view<char,std::char_traits<char>>) Line 970 (z:\alef\src\json.h:970)
cataclysm-tiles.exe!item_location::impl::item_in_container::serialize(JsonOut & js) Line 657 (z:\alef\src\item_location.cpp:657)
[Inline Frame] cataclysm-tiles.exe!JsonOut::write(const item_location &) Line 807 (z:\alef\src\json.h:807)
[Inline Frame] cataclysm-tiles.exe!JsonOut::write_as_array(const std::vector<item_location,std::allocator<item_location>> &) Line 890 (z:\alef\src\json.h:890)
[Inline Frame] cataclysm-tiles.exe!JsonOut::write(const std::vector<item_location,std::allocator<item_location>> &) Line 902 (z:\alef\src\json.h:902)
[Inline Frame] cataclysm-tiles.exe!JsonOut::member(const std::basic_string_view<char,std::char_traits<char>>) Line 970 (z:\alef\src\json.h:970)
cataclysm-tiles.exe!consume_menu_uistate::serialize(JsonOut & json) Line 3220 (z:\alef\src\game_inventory.cpp:3220)
cataclysm-tiles.exe!uistatedata::serialize(JsonOut & json) Line 427 (z:\alef\src\inventory_ui.cpp:427)
[Inline Frame] cataclysm-tiles.exe!game::save::__l7::<lambda_2>::operator()(std::basic_ostream<char,std::char_traits<char>> &) Line 748 (z:\alef\src\game_io.cpp:748)
[Inline Frame] cataclysm-tiles.exe!std::invoke(game::save::__l7::<lambda_2> &) Line 1680 (c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\type_traits:1680)
cataclysm-tiles.exe!std::_Func_impl_no_alloc<`game::save'::`7'::<lambda_2>,void,std::basic_ostream<char,std::char_traits<char>> &>::_Do_call(std::basic_ostream<char,std::char_traits<char>> & <_Args_0>) Line 880 (c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\functional:880)
[Inline Frame] cataclysm-tiles.exe!std::_Func_class<void,std::basic_ostream<char,std::char_traits<char>> &>::operator()(std::basic_ostream<char,std::char_traits<char>> &) Line 926 (c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include\functional:926)
cataclysm-tiles.exe!write_to_file(const cata_path & path, const std::function<void __cdecl(std::basic_ostream<char,std::char_traits<char>> &)> & writer) Line 323 (z:\alef\src\cata_utility.cpp:323)
cataclysm-tiles.exe!write_to_file(const cata_path & path, const std::function<void __cdecl(std::basic_ostream<char,std::char_traits<char>> &)> & writer, const char * fail_message) Line 331 (z:\alef\src\cata_utility.cpp:331)
cataclysm-tiles.exe!game::save() Line 744 (z:\alef\src\game_io.cpp:744)
cataclysm-tiles.exe!game::quicksave() Line 899 (z:\alef\src\game_io.cpp:899)
cataclysm-tiles.exe!game::autosave() Line 937 (z:\alef\src\game_io.cpp:937)
cataclysm-tiles.exe!do_turn() Line 545 (z:\alef\src\do_turn.cpp:545)
cataclysm-tiles.exe!WinMain(HINSTANCE__ * __formal, HINSTANCE__ * __formal, char * __formal, int __formal) Line 867 (z:\alef\src\main.cpp:867)
[Inline Frame] cataclysm-tiles.exe!invoke_main() Line 102 (d:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:102)
cataclysm-tiles.exe!__scrt_common_main_seh() Line 288 (d:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288)
kernel32.dll!00007ffb76b5e8d7() (Unknown Source:0)
ntdll.dll!00007ffb7728c53c() (Unknown Source:0)

[alef]

Loading the OP savefile:

DEBUG : parent location doesn't exist.  Item_location has lost its target over a save/load cycle.

REPORTING FUNCTION : deserialize
C++ SOURCE FILE    : Z:\alef\src\item_location.cpp
LINE               : 894
VERSION            : cdda-experimental-2025-11-21-1433-618-g824c161117-dirty

Somewhere of uistate.json:

"consume_menu_selected_items": [
    {
        "idx": 0,
        "type": "in_container",
        "parent": {
            "type": "vehicle",
            "position": [
                2218,
                3627,
                0
            ],
            "part": 60,
            "idx": 440
        }
    }
],

[GuardianDll]

Resolved by #84466 (or it seems so, stay tuned for future bugreports)