error in Call, No Exist such lua ins or ins has been released

[mirchd]

void ASLGBuildingActor::BeginPlay() { Super::BeginPlay(); LuaCall("beginPlay", this); }

function Call(functionName, inscpp, ...) if type(inscpp) == "table" and not inscpp._hasdestroy then return inscpp[functionName](inscpp, ...) else dump(inscpp) ensure(false, "error in Call, No Exist such lua ins or ins has been released") end end

lua.log:

[Thu Mar 8 22:06:29 2018] - }
[Thu Mar 8 22:06:29 2018] - "_gc_list" = {
[Thu Mar 8 22:06:29 2018] - userdata: 0000000089E33548 = true
[Thu Mar 8 22:06:29 2018] - }
[Thu Mar 8 22:06:29 2018] - "_hasdestroy" = true
[Thu Mar 8 22:06:29 2018] - "beginPlay" = function: 00000000850A2AE8
[Thu Mar 8 22:06:29 2018] - "initNameInfo" = function: 00000000850A2AC0
[Thu Mar 8 22:06:29 2018] - "m_HasBeginPlay" = true
[Thu Mar 8 22:06:29 2018] - "m_HasEndPlay" = true
[Thu Mar 8 22:06:29 2018] - }
...al/SteelOcean/Client_4.18/LuaSource/util\logutil.lua:57: error in Call, No Exist such lua ins or ins has been released...al/SteelOcean/Client_4.18/LuaSource/util\logutil.lua:57: error in Call, No Exist such lua ins or ins has been released stack traceback: [C]: in function 'error' ...al/SteelOcean/Client_4.18/LuaSource/util\logutil.lua:57: in function 'ensure' E:/Unreal/SteelOcean/Client_4.18/LuaSource/main.lua:85: in function <E:/Unreal/SteelOcean/Client_4.18/LuaSource/main.lua:80>

the ASLGBuildingActor new and delete frequently。 please help

[asqbtcupid]

function CppObjectBase:Destroy()
    for v in pairs(self._gc_list) do
        if v.Release then
            v:Release()
        end
    end
    LinkAgainstGC[self] = nil
    local _cppinstance_ = rawget(self, "_cppinstance_")
    if _cppinstance_ then 
        if _cppinstance_.Destroy then
            _cppinstance_:Destroy()
        end

               _setexisttable(_cppinstance_, nil)

        rawset(self, "_cppinstance_", nil)
    end
    LevelActors[self] = nil
end

yes,this may be a bug. Add the code to the CppObjectbase 's Destroy function may help.Look forward your feedback.

[mirchd]

it seem to be ok, thank you very much!

why it happen? the ptr of cpp ins reused by UE4?

[asqbtcupid]

yes,after UE4 GC,the memory in cpp will be reused.But lua didn't GC at the same time.So it's cppins->luains relationship is out of time.I will fix this bug latter.

[mirchd]

so if i use cpp ptr as some key, it may also has some problem in ue4,

thanks

[asqbtcupid]

if you mark it with UPROPERTY, then don't worry about it,I won't be reused.Otherwise, you shouldn't keep uobject* ptr.

[mirchd]

en, unreal.lua is a good job, thanks