Access violation on std::function assignement using lambdas - c++

Question

Hy everyone, here again. Continuing the code from my previous question : Is this a bad hack? memcpy with virtual classes
I corrected that, using the Clone approach as suggested, but I'm having an error that also happened before I tried the memcpy thing(read question above).
What I'm trying to do is to create a lambda that captures the current script and executes it, and then pass and store that lambda in an object ( Trigger*), in the member InternalCallback.
I get an access violation error on the lambda assignment: http://imgur.com/OKLMJpa
The error happens only at the 4th iteration of this code:
if(CheckHR(EnginePTR->iPhysics->CreateFromFile(physicsPath,StartingTriggerID,trans,scale,-1,false,engPtr)) == HR_Correct)
{
_Lua::ScriptedEntity * newScript = EntityBase->Clone(vm);//nullptr;
string luaPath = transforms.next_sibling().next_sibling().first_attribute().as_string();
if(UseRelativePaths)
{
stringstream temp2;
temp2 << _Core::ExePath() << LuaSubfolder << "\\" << luaPath;
luaPath = temp2.str();
}
newScript->CompileFile(luaPath.c_str());
newScript->EnginePTR_voidptr = engPtr;
auto callback = [=](_Physics::Trigger* trigger,PxTriggerPair* pairs, PxU32 count)
{
newScript->SelectScriptFunction("TriggerCallback");
newScript->AddParam(trigger->Id);
auto data = (_Physics::RayCastingStats*)pairs->otherShape->userData;
newScript->AddParam((PxU8)pairs->flags);
newScript->AddParam(data->ID);
newScript->AddParam((int)data->Type);
newScript->AddParam((int)count);
newScript->Go(1);
return;
};
((_Physics::Trigger*)EnginePTR->iPhysics->GetPhysicObject(StartingTriggerID))->InternalCallback = callback;
StartingTriggerID++;
}
This is the code for Trigger
class Trigger : public PhysicObject
{
public:
Trigger()
{
ActorDynamic = nullptr;
ActorStatic = nullptr;
InternalCallback = nullptr;
}
virtual HRESULT Update(float ElapsedTime,void * EnginePTR);
virtual HRESULT Cleanup(); // Release the actor!!
long Id;
ShapeTypes Type;
static const PhysicObjectType PhysicsType = PhysicObjectType::Trigger;
PxVec3 Scale;
void* UserData;
void Callback(PxTriggerPair* pairs,PxU32 count)
{
InternalCallback(this,pairs,count);
}
function<void(_Physics::Trigger* trigger,PxTriggerPair* pairs, PxU32 count)> InternalCallback;
};
By iteration I mean that is part of a for loop.
My system is Win 7 64 bits, Intel i3, NVIDIA GTX 480, and the compiler Visual Studio 2012 Express, using the C++11 toolset.
I'm really out of ideas. I tested for heap corruption, it appears to be good, I changed the capture in the lambda, changed nothing, I skip the 4th object and it works.
Any help would be really appreciated.
Edit: As required, here is the callstack: http://imgur.com/P7P3t4k

Answer 1

Solved. It was a design error. I store a lot of objects in a map, and they all derive from an object class ( like above, where Trigger derives from PhysicObject ).
The problem was that I was having IDs collisions, so the object stored in ID 5 wasn't a Trigger, so the cast created a bad object, and so the program crashed.
Silly error, really specific, but it might help somebody to remember to check temporal objects.