Not exactly a bug report, but where to check for lua related errors reports/workarounds

I’ve got the following, but it is not exactly a usual behavior/observation related. Is there some place where we posts these as well as search for solutions/workarounds for similar errors?

I got this when loading a previous save. There seems to be no observable difference even after I ignore it.
I am guessing if it is related to auto-scaffolding issues, the only related thing I did was to remove a left over scaffolding + ladder (which was not removed even when there are idles) by using debug commands. (the error did not surface until much later when I load a game in a new session though).

From the Log file:

2016-08-07 14:55:48.159600 | server |  0 |                         lua.code | -- Script Error (lua) Begin ------------------------------- 
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |    ...onehearth/components/building/building_component.lua:484: attempt to index local 'entity' (a nil value)
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |    stack traceback:
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |        radiant/modules/common.lua:237: in function 'report_traceback'
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |        radiant/modules/common.lua:248: in function <radiant/modules/common.lua:242>
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |        ...onehearth/components/building/building_component.lua:484: in function '_trace_entity'
2016-08-07 14:55:48.159600 | server |  0 |                         lua.code |        ...onehearth/components/building/building_component.lua:174: in function '_restore_structure_traces'
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        ...onehearth/components/building/building_component.lua:114: in function 'obj'
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        radiant/modules/events.lua:75: in function 'instance'
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        radiant/modules/events.lua:227: in function <radiant/modules/events.lua:221>
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        [C]: in function 'xpcall'
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        radiant/modules/common.lua:257: in function 'xpcall'
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code |        radiant/modules/events.lua:221: in function <radiant/modules/events.lua:187>
2016-08-07 14:55:48.160600 | server |  0 |                         lua.code | -- Lua Error End   ------------------------------- 

Thanks