Attempt to index a nil value

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Title: Unknown Engine error attempt to index a nil value

Summary: When starting new town, attempted to get Hearthlings to organize items into stockpiles so it looked “nice”. While moving items between 2 stockpiles, 2 engines errors came up. Not able to reproduce yet…but the last few tasks I did are listed below

Steps to reproduce: (maybe!)

  1. Create a stockpile with items in it.
  2. Create a second stockpile and delete first stockpile
  3. Wait for Hearthlings to move items from old location to new.
  4. Recreate first stockpile with filter set to only 1 item.
  5. Set second stockpile to none
  6. Delete second stockpile

Expected Results: Hearthlings move items selected to first stockpile, leave all non-filtered items on ground where second stockpile was deleted.

Actual Results: Engine error appears, Hearthlings continue to function as expected.

Notes:

release-472 (x64)
radiant/modules/entities.luac:377: attempt to index a nil value
stack traceback:
	radiant/modules/entities.luac:377: in function 'trace_location'
	...ai/actions/pickup_item_type_from_storage_action.luac:7: in function 'start'
	stonehearth/services/server/ai/compound_action.luac:123: in function <stonehearth/services/server/ai/compound_action.luac:122>
	[C]: ?
	[C]: in function 'start'
	stonehearth/services/server/ai/compound_action.luac:125: in function <stonehearth/services/server/ai/compound_action.luac:122>
	[C]: ?
	[C]: in function 'start'
	stonehearth/services/server/ai/compound_action.luac:125: in function <stonehearth/services/server/ai/compound_action.luac:122>
	[C]: ?
	[C]: in function 'start'
	...
	[C]: ?
	[C]: in function 'start'
	stonehearth/services/server/ai/compound_action.luac:125: in function <stonehearth/services/server/ai/compound_action.luac:122>
	[C]: ?
	[C]: in function 'run'
	stonehearth/components/ai/ai_component.luac:186: in function '_thread_main'
	stonehearth/services/server/threads/thread.luac:90: in function <stonehearth/services/server/threads/thread.luac:89>
	[C]: in function 'xpcall'
	stonehearth/services/server/threads/thread.luac:89: in function 'f'
	radiant/lib/env.luac:8: in function <radiant/lib/env.luac:8>

Attachments: None provided, no save before error occurred, unable to reproduce.

Versions and Mods: Alpha 12, release 472 with debug tools

System Information: Windows 10 Pro 64 | Intel Core i5-3360M | 16 GB system memory | Nvidia NVS 5400m

1 Like
2

release-465 (x64)

Crafted and placed stone chests, set storage of items, removed starter stockpile and got errors.

Save games (before bug and after):

https://drive.google.com/file/d/0BwVB_JALK8Q3b0ZFTUpvb04zbjQ/view?usp=sharing

https://drive.google.com/file/d/0BwVB_JALK8Q3RWNBeGNXSWFxQVk/view?usp=sharing

Note: I have storage somewhere for all item types that were in that stockpile except plants.

1/2

release-465 (x64)
radiant/modules/entities.luac:377: attempt to index a nil value
stack traceback:
radiant/modules/entities.luac:377: in function ‘trace_location’
…ai/actions/pickup_item_type_from_storage_action.luac:7: in function 'start’
stonehearth/services/server/ai/compound_action.luac:123: in function <stonehearth/services/server/ai/compound_action.luac:122>
[C]: ?
[C]: in function 'start’
stonehearth/services/server/ai/compound_action.luac:125: in function <stonehearth/services/server/ai/compound_action.luac:122>
[C]: ?
[C]: in function 'start’
stonehearth/services/server/ai/compound_action.luac:125: in function <stonehearth/services/server/ai/compound_action.luac:122>
[C]: ?
[C]: in function ‘start’
…
[C]: in function 'run’
stonehearth/services/server/ai/compound_action.luac:133: in function <stonehearth/services/server/ai/compound_action.luac:129>
[C]: ?
[C]: ?
[C]: in function 'run’
stonehearth/components/ai/ai_component.luac:186: in function '_thread_main’
stonehearth/services/server/threads/thread.luac:90: in function <stonehearth/services/server/threads/thread.luac:89>
[C]: in function 'xpcall’
stonehearth/services/server/threads/thread.luac:89: in function 'f’
radiant/lib/env.luac:8: in function <radiant/lib/env.luac:8>

2/2

release-465 (x64)
invalid initial state “starting” in run
stack traceback:
[C]: ?
[C]: in function 'run’
stonehearth/services/server/ai/compound_action.luac:133: in function <stonehearth/services/server/ai/compound_action.luac:129>
[C]: ?
[C]: ?
[C]: in function 'run’
stonehearth/services/server/ai/compound_action.luac:133: in function <stonehearth/services/server/ai/compound_action.luac:129>
[C]: ?
[C]: ?
[C]: in function ‘run’
…onehearth/services/server/tasks/run_task_action.luac:57: in function <…onehearth/services/server/tasks/run_task_action.luac:57>
…
[C]: in function 'run’
stonehearth/services/server/ai/compound_action.luac:133: in function <stonehearth/services/server/ai/compound_action.luac:129>
[C]: ?
[C]: ?
[C]: in function 'run’
stonehearth/components/ai/ai_component.luac:186: in function '_thread_main’
stonehearth/services/server/threads/thread.luac:90: in function <stonehearth/services/server/threads/thread.luac:89>
[C]: in function 'xpcall’
stonehearth/services/server/threads/thread.luac:89: in function 'f’
radiant/lib/env.luac:8: in function <radiant/lib/env.luac:8>