Strange Lua Error

Letho · 05/14/16, 01:32 AM

Hello fellow coders,
I'm currently running into an issue that i am not able to resolve. I'm getting this error from time to time, sometimes just on login, sometimes when clicking on sth.

I'm not really experienced at coding lua, but as far as i know the error message should at least provide some information on the addon or file that produces it. The long numeric value doesnt look like a memory adress to me and it could be referring to a 'line 3', but where exactly? and whats does "function '(main chunk)'" represent?

Thx in advance and cheers,
Letho

votan · 05/14/16, 01:58 AM

Originally Posted by Letho

Hello fellow coders,
I'm currently running into an issue that i am not able to resolve. I'm getting this error from time to time, sometimes just on login, sometimes when clicking on sth.

I'm not really experienced at coding lua, but as far as i know the error message should at least provide some information on the addon or file that produces it. The long numeric value doesnt look like a memory adress to me and it could be referring to a 'line 3', but where exactly? and whats does "function '(main chunk)'" represent?

Thx in advance and cheers,
Letho

This is a hard to find error. The generic number as function name indicates an anonymous (nameless) function. "(main chunk)" as the only caller in the callstack indicates it is called directly from C++ buildin code.

If you say, it is just from time to time, I would guess it is a timing problem from an <OnUpdate> event handler.

Which addons are you using? Which are using UI xml files with <OnUpdate>?

Letho · 05/14/16, 02:32 AM

Hey, thx for your reply!

It must be somewhere in the addon that i am currently developing, strangely the only OnUpdate-functionality i use is

lua Code:

EVENT_MANAGER:RegisterForUpdate(AuraMastery.name, AuraMastery.savedVariables.updateSpeed, AuraMastery.updateHandler);
 
[...]
 
function AuraMastery.updateHandler()
    local n = AuraMastery:GetNumElements(AuraMastery.loadedAuras);
    --d(tostring(AuraMastery.activeAura));
    for k, v in pairs(AuraMastery.loadedAuras) do
        AuraMastery:UpdateBar(v);
    end
end

this updatehandler is definetely working as intended, otherwise my addon would throw many errors at me^^

It must have sth. to do with the addon menu itself, it's containing many editboxes with OnMouse..., OnFocus... - handlers, but of course no OnUpdate :/

The bug only occurs if my addon is loaded, but it seems to occur absolutely randomly.

votan · 05/14/16, 03:02 AM

Originally Posted by Letho

Hey, thx for your reply!

It must be somewhere in the addon that i am currently developing, strangely the only OnUpdate-functionality i use is

lua Code:

EVENT_MANAGER:RegisterForUpdate(AuraMastery.name, AuraMastery.savedVariables.updateSpeed, AuraMastery.updateHandler);
 
[...]
 
function AuraMastery.updateHandler()
    local n = AuraMastery:GetNumElements(AuraMastery.loadedAuras);
    --d(tostring(AuraMastery.activeAura));
    for k, v in pairs(AuraMastery.loadedAuras) do
        AuraMastery:UpdateBar(v);
    end
end

this updatehandler is definetely working as intended, otherwise my addon would throw many errors at me^^

It must have sth. to do with the addon menu itself, it's containing many editboxes with OnMouse..., OnFocus... - handlers, but of course no OnUpdate :/

The bug only occurs if my addon is loaded, but it seems to occur absolutely randomly.

Where and when do you call EVENT_MANAGER:RegisterForUpdate? EVENT_ADD_ON_LOADED, EVENT_PLAYER_ACTIVATED?

Letho · 05/14/16, 05:35 AM

This is the whole initialization, i call it directly at the beginning of the addon logic.

lua Code:

AuraMastery                 = {}
AuraMastery.name            = "AuraMastery"
AuraMastery.version         = "0.01a"
AuraMastery.author      = "Letho"
 
-- locals
local WM = WINDOW_MANAGER;
local profileDefaults       = {
    updateSpeed             = 100,
    activeProfile           = 1,
    profiles                    = {
        ["profileNames"]    = {
            [1]                 = "default",
        },
        ["profileData"]     = {
            [1] = {
                ['auraData'] = {};
            },
        }
    }   
};
AuraMastery.activeEffects   = {};
AuraMastery.trackedEvents   = {
    ['EVENT_EFFECT_CHANGED'] = {
        ['abilityIds'] = {};
    }
};
AuraMastery.loadedAuras     = {};
AuraMastery.auraAbilityIds = {};
AuraMastery.menuHidden      = true;
 
-- initialization
function AuraMastery.OnAddOnLoaded(event, addonName)
    if addonName ~= AuraMastery.name then return end    
    EVENT_MANAGER:UnregisterForEvent(AuraMastery.name, EVENT_ADD_ON_LOADED);
    AuraMastery:Initialize();
end
 
function AuraMastery:Initialize()
    self:LoadProfileData();
    self:InitializeControls();
    
    EVENT_MANAGER:RegisterForEvent(AuraMastery.name, EVENT_EFFECT_CHANGED, AuraMastery.OnEffectEvent);
    EVENT_MANAGER:RegisterForUpdate(AuraMastery.name, AuraMastery.savedVariables.updateSpeed, AuraMastery.updateHandler);
end
 
function AuraMastery:LoadProfileData()
    self.savedVariables = ZO_SavedVars:New("AuraMasterySavedVariables", 1, nil, profileDefaults);
    self.svars = self.savedVariables.profiles.profileData[self.savedVariables.activeProfile];
end
 
local function slashHandler(userInput)
    local parsedUserInput = {string.match(userInput,"^(%S*)%s*(.-)$")}
    local command = {}
    local n = #parsedUserInput;
    for i=1, n do
        if (parsedUserInput[i] ~= nil and parsedUserInput[i] ~= "") then
            command[i] = string.lower(parsedUserInput[i]);
        end
    end
 
    if ("unlock" == command[1]) then
        for k, v in pairs(AuraMastery.aura) do
            AuraMastery:UnloadAuras();
            v:SetHidden(false);
            v:SetMouseEnabled(true);
            v:SetMovable(true);
            SetGameCameraUIMode(true);
        end
        d("Auras unlocked.");
    end
    
    if ("lock" == command[1]) then
        for k, v in pairs(AuraMastery.aura) do
            AuraMastery:LoadAura(k);
            v:SetHidden(true);
            v:SetMouseEnabled(false);
            v:SetMovable(false);
            SetGameCameraUIMode(false);
        end
        d("Auras locked.");
    end
 
    if ("menu" == command[1]) then
        local container = WM:GetControlByName("AuraMasteryMenuContainer");
        --self:CreateMenu();
        if (container:IsHidden()) then
            container:SetHidden(false);
        else
            container:SetHidden(true);
        end
    end
 
    if ("tex" == command[1]) then
        AuraMastery:Tex();
    end
end
SLASH_COMMANDS["/am"] = slashHandler;
 
EVENT_MANAGER:RegisterForEvent(AuraMastery.name, EVENT_ADD_ON_LOADED, AuraMastery.OnAddOnLoaded);

sirinsidiator · 05/14/16, 05:40 AM

Errors like this are usually caused by functions that are called from an xml file.
Do you use any xml controls in your addon?

Letho · 05/14/16, 06:48 AM

Hey sirinsidiator, thx for your reply!

Yes, I preload my whole addon menu by loading it from an xml file on addon start (im gonna implement a "only load menu controls if called" - functionality later). All event handlers are working as intended, is there any rule that there must be some standard handlers set up for any specific control?

sirinsidiator · 05/14/16, 11:13 AM

When you use xml files, you should make sure that all functions that you use inside the xml file are already defined when it is loaded, otherwise you may see errors like the one you posted.

Simply put xml files after your lua files in the manifest and only try access the controls after EVENT_ADDON_LOADED was fired for your addon.

Letho · 05/14/16, 11:18 AM

D'OH, Letho is so stupid

That solved the issue, thank you very much =)