Lua - Attempt to index local 'item' (a function value) -

i'm getting error, , can't figure out if it's scoping issue, logic issue, or else entirely. objective, in c terms, modify pointer within module change behavior of draw() command. place error coming is:

function m.draw()   k, item in pairs(m.buttons.current)     love.graphics.setcolor(m.buttons.bkg_color)     love.graphics.rectangle("fill", item.pos_x, item.pos_y, m.buttons.size_x, m.buttons.size_y)     love.graphics.setcolor(m.buttons.txt_color)     --todo: center text on button     love.graphics.print(item.text, item.pos_x+10, item.pos_y+10)   end end 

this function works in first menu, when click button change menus, error pops in love.graphics.rectangle(...) line. code changes m.buttons.current is:

function m.mousereleased(x, y, button)   if button == 'l' , m.buttons.buttonpressedflag , m.mousecollide(x,y,m.buttons.buttonpressed)     m.buttons.buttonpressed.fun()   end   m.buttons.buttonpressedflag = false end 

and button i'm clicking defined during initialization using:

m.formbutton( m.buttons.main,               "options",               global_settings.resolution_x/2-m.buttons.size_x,               global_settings.resolution_y/7*5-m.buttons.size_y,               m.buttons.size_x,               m.buttons.size_y,               "options",               function() m.buttons.current = m.buttons.main.options end ) 

where m.formbutton defined @ top of module:

function m.formbutton(menu, buttonname, pos_x, pos_y, size_x, size_y, text, fun)   menu[buttonname].pos_x = pos_x   menu[buttonname].pos_y = pos_y   menu[buttonname].size_x = size_x   menu[buttonname].size_y = size_y   menu[buttonname].text = text   menu[buttonname].fun = fun end 

each of buttons should in new menu defined similarly. reference, prototype of module's structure is:

local m = {buttons = { main = { campaign =    { newgame =  {},                                                 continue = {},                                                 load =     {},                                                 =     {} },                                 freeplay =    { newgame =  {},                                                 continue = {},                                                 load =     {},                                                 custom =   {},                                                 =     {} },                                 multiplayer = { lan =      { newgame = {},                                                              load =    {},                                                              =    {}, },                                                 hotseat =  { newgame = {},                                                              load =    {},                                                              =    {}, },                                                 network =  { newgame = {},                                                               load =    {},                                                              =    {} } },                                 options =    {  audio =    {},                                                 display =  {},                                                 gameplay = {},                                                 language = {} },                                 exitgame =   {} } } } 

i'm pretty sure issue coming the third line in mousereleased function combined way i've instantiated button, can't figure out issue is. it's distressingly simple i'm missing because i'm new language, appreciated.

you're overriding m.buttons.options or m.buttons.current somewhere, changing function value. try adding print(type(m.buttons.current), type(m.buttons.options)) periodically between function calls - should able narrow down offending code.