2017-06-27 12:56:43: ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: Runtime error from mod 'crafting' in callback on_playerReceiveFields(): invalid key to 'next'
2017-06-27 12:56:43: ERROR[Main]: stack traceback:
2017-06-27 12:56:43: ERROR[Main]: 	[C]: in function 'set_list'
2017-06-27 12:56:43: ERROR[Main]: 	/home/user/.minetest/games/pixture/mods/crafting/api.lua:372: in function 'func'
2017-06-27 12:56:43: ERROR[Main]: 	/usr/share/minetest/builtin/profiler/instrumentation.lua:106: in function </usr/share/minetest/builtin/profiler/instrumentation.lua:100>
2017-06-27 12:56:43: ERROR[Main]: 	/usr/share/minetest/builtin/game/register.lua:412: in function </usr/share/minetest/builtin/game/register.lua:392>