minetest random server crash?

10:03:14: ACTION[ServerThread]: Martyne places node default:torch at (6,15,-64)
nil
nil
10:03:21: ERROR[main]: ERROR: An unhandled exception occurred: ServerError: LuaError: ...est/.minetest/mods/technic/unified_inventory/api.lua:556: bad argument #1 to 'next' (table expected, got nil)
10:03:21: ERROR[main]: stack traceback:
10:03:21: ERROR[main]: 	[C]: in function 'next'
10:03:21: ERROR[main]: 	...est/.minetest/mods/technic/unified_inventory/api.lua:556: in function 'update_recipe'
10:03:21: ERROR[main]: 	...est/.minetest/mods/technic/unified_inventory/api.lua:420: in function <...est/.minetest/mods/technic/unified_inventory/api.lua:291>