Engine Error using building wall tool to create a wall extension

Summary:

Building walls fail when using a single line.

Steps to reproduce:

  1. Create a floor box
  2. Add a single line of floor connected to the floor box
  3. Use wall tool

Expected Results: Closed room for building with a single wall extension

Actual Results:

Walls do not complete, stalls out at single piece extension
Undo does not remove walls
Building cannot be removed
Cannot build anything further

Notes:

release-687 (x64)
stonehearth/components/wall/wall_component.lua:372: attempt to index a nil value
stack traceback:
[C]: ?
stonehearth/components/wall/wall_component.lua:372: in function ‘connect_to_columns’
stonehearth/services/server/build/build_service.lua:1264: in function ‘init_fn’
stonehearth/services/server/build/build_service.lua:529: in function ‘_create_blueprint’
stonehearth/services/server/build/build_service.lua:1262: in function ‘_create_wall’
stonehearth/services/server/build/build_service.lua:1249: in function ‘_add_wall_span’
stonehearth/services/server/build/build_service.lua:1078: in function ‘visitor_fn’
stonehearth/lib/build_util.lua:819: in function ‘grow_walls_around’
stonehearth/services/server/build/build_service.lua:1077: in function ‘grow_walls’
stonehearth/services/server/build/build_service.lua:1049: in function ‘cb’
stonehearth/services/server/build/build_service.lua:1582: in function ‘do_command’
stonehearth/services/server/build/build_service.lua:1048: in function <stonehearth/services/server/build/build_service.lua:1046>

release-687 (x64)
c++ exception: lua runtime error
stack traceback:

release-687 (x64)
…ehearth/services/server/build/build_undo_manager.lua:415: assertion failed!
stack traceback:
[C]: ?
[C]: in function ‘assert’
…ehearth/services/server/build/build_undo_manager.lua:415: in function ‘clear’
stonehearth/services/server/build/build_service.lua:111: in function ‘set_teardown’
stonehearth/call_handlers/build_call_handler.lua:25: in function <stonehearth/call_handlers/build_call_handler.lua:23>

Attachments:

Version Number and Mods in use: No Mods

System Information: