The mod Construction Drones (0.6.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Construction_Drones::on_ai_command_completed (ID 115)
Construction_Drones/script/construction_drone.lua:1265: stack overflow
stack traceback:
Construction_Drones/script/construction_drone.lua:1265: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
...
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function 'set_drone_idle'
Construction_Drones/script/construction_drone.lua:1293: in function <Construction_Drones/script/construction_drone.lua:1263>
(...tail calls...)
Construction_Drones/script/construction_drone.lua:628: in function <Construction_Drones/script/construction_drone.lua:620>
(...tail calls...)
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>