RunState：LUA_ERROR：字符串 「devils_catacomb」]：1：試圖調用現場`get_devil_base」（一個零值）

Question

大家好，我的英語不好我有一個問題

ERROR

SYSERR: Apr 11 14:16:12 :: RunState: LUA_ERROR: [string "devils_catacomb"]:1: attempt to call field `get_devil_base' (a nil value) 
SYSERR: Apr 11 14:16:12 :: WriteRunningStateToSyserr: LUA_ERROR: quest >devils_catacomb.start click 
SYSERR: Apr 11 14:12:32 :: RunState: LUA_ERROR: >locale/turkey/quest/object/state/deviltower_zone:1: attempt to indexglobal`positions' (a nil value) 
SYSERR: Apr 11 14:12:32 :: WriteRunningStateToSyserr: LUA_ERROR: quest >deviltower_zone.start click 

我deviltower_zone.lua

////////Error formed location///////// 

function get_4floor_stone_pos() 
    local positions,j,t = {{368, 629}, {419, 630}, {428, 653}, {422, 679}, 
{395, 689}, {369, 679}, {361, 658},},number(i,7), positions[i]; 
    for i = 1, 6 do 
     if (i != j) then 
      local t = positions[i]; 
      positions[i] = positions[j]; 
      positions[j] = t; 
     end 
    end 
    return positions 
end 

when 8016.kill with pc.get_map_index() >= 660000 and pc.get_map_index() < 
670000 begin 
    d.setf("level", 4) 
    local positions,vid = deviltower_zone.get_4floor_stone_pos() 
,d.spawn_mob(8017, positions[7][1], positions[7][2]) 
    for i = 1, 6 do d.set_unique("fake" .. i , d.spawn_mob(8017, 
positions[i][1], positions[i][2])) end 
    d.set_unique("real", vid) 
    server_loop_timer('devil_stone4_update', 10, pc.get_map_index()) 
    server_timer('devil_stone4_fail1', 5*60, pc.get_map_index()) 
    notice_multiline(gameforge.deviltower_zone._50_dNotice,d.notice) 

end 

Answer 1

有一對夫婦，在那裏你使用positions表中歸屬的右手邊local positions地方。 Lua總是在左手邊之前完全評估右手邊，所以在這種情況下，positions引用了一個全局變量。

第一次出現：在該行：

local positions,j,t = {{368, 629}, {419, 630}, {428, 653}, {422, 679}, {395, 689}, {369, 679}, {361, 658},},number(i,7), positions[i]; 

你可能是指：

local positions = {{368, 629}, {419, 630}, {428, 653}, {422, 679}, {395, 689}, {369, 679}, {361, 658},} 
local j, t = number(i,7), positions[i] 

（雖然這是行不通的100％，因爲我還不存在 - 它可能會更好只是不使用t變量）

而在這行：

local positions,vid = deviltower_zone.get_4floor_stone_pos(), d.spawn_mob(8017, positions[7][1], positions[7][2]) 

你大概意思做這樣的事情：

local positions = deviltower_zone.get_4floor_stone_pos() 
local vid = d.spawn_mob(8017, positions[7][1], positions[7][2])