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IDProjectCategoryView StatusLast Update
0013355Dwarf FortressDwarf Mode -- Visitorspublic2025-11-22 04:36
ReporterMarauder__ Assigned To 
PriorityurgentSeveritycrashReproducibilityalways
Status newResolutionopen 
PlatformWindowsOSWindows 10/11 (64-bit)OS VersionLatest updates i
Product Version53.05 
Summary0013355: Deterministic crash when human caravan from Mong Ithbi arrives (save included)
DescriptionDwarf Fortress 53.05 consistently crashes on the exact tick when a human caravan from Mong Ithbi arrives.

Crash happens in:
- clean vanilla DF 53.05 (DFHack disabled)
- DFHack 53.05-r1
- regardless of fortress activity
- regardless of suppressing caravans (hermit mode)

The last message before the crash is always:

"A human caravan from Mong Ithbi has arrived."

No caravan units appear in the ā€˜u’ list before the crash. Crash happens instantly on caravan spawn tick.

errorlog.txt contains no errors.

This suggests a corrupted caravan mission, entity, historical figure or nemesis related to the Mong Ithbi civilization.

The crash is 100% reproducible.
Steps To Reproduce1. Download and unzip the attached save (region7.zip).
2. Launch vanilla Dwarf Fortress 53.05 (Steam).
3. Load the fortress.
4. Unpause.
5. Within several seconds, the message appears:

   "A human caravan from Mong Ithbi has arrived."

6. The game immediately crashes to desktop.

Crash is 100% reproducible.
Additional Information- No caravan units exist before the crash.
- Crash occurs before caravan population is generated.
- errorlog.txt only contains "Steam API init failed".
- No mods used; clean Steam installation.
- DFHack tests (fix/*, hermit, retrieve-units, etc.) produce no changes.
- The save appears structurally intact (no zero-size files).
- Likely cause: corrupted caravan entity, nemesis, or histfig.

Save included below.
Tags53.05, caravan, crash, dwarf mode, reproducible, seasonal_crash, visitors

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Issue History

Date Modified Username Field Change
2025-11-22 04:31 Marauder__ New Issue
2025-11-22 04:31 Marauder__ Tag Attached: 53.05
2025-11-22 04:31 Marauder__ Tag Attached: caravan
2025-11-22 04:31 Marauder__ Tag Attached: crash
2025-11-22 04:31 Marauder__ Tag Attached: dwarf mode
2025-11-22 04:31 Marauder__ Tag Attached: reproducible
2025-11-22 04:31 Marauder__ Tag Attached: seasonal_crash
2025-11-22 04:31 Marauder__ Tag Attached: visitors
2025-11-22 04:36 Marauder__ Note Added: 0043001