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General / "Access violation" reading null (runtime error), main() does not execute

« on: January 01, 2015, 11:00:34 pm »

Hey all, whenever I run my game, the application crashes immediately without entering main(). On debugging, I get an error:

Unhandled exception at 0x55E76001 (sfml-graphics-d-2.dll) in DungeonRaider.exe:
0xC0000005: Access violation reading location 0x00000000.

The offending code is in my Animation class's assignment operator.

The Animation class consists of a dynamic array of sf::Sprite objects. When the assignment operator executes, the sf::Sprite objects from the source Animation object are copied by value to the new Animation object, like such:

Animation& operator=(const Animation& srcAnimation) const
{
    //sprite_ is the dynamic array of sf::Sprite objects

    /*...code to delete the elements of the old array and make space for the new one...*/

    sprites_ = new sf::Sprite[/*...the new number of sprites...*/];
    for(int i=0;i</*...the new number of sprites...*/;i++)
    {
        sprites_[i].setTexture(*(srcAnimation.sprites_[i].getTexture())); //<----This is the line that debugging stops at
    }
}
 

I've checked that I'm linking debug libraries for debug mode.

This is the call stack:

        sfml-graphics-d-2.dll!55e76001()        Unknown
        [Frames below may be incorrect and/or missing, no symbols loaded for sfml-graphics-d-2.dll]    
        sfml-graphics-d-2.dll!55e8155d()        Unknown
>       DungeonRaider.exe!Animation::operator=(const Animation & srcAnimation) Line 110 C++
        DungeonRaider.exe!AnimState::AnimState() Line 24        C++
        DungeonRaider.exe!AnimStateController::AnimStateController() Line 27    C++
        DungeonRaider.exe!`dynamic initializer for 'AnimStateComponent::s_defaultController''() Line 55 C++
        [External Code]

Any ideas? I'm not quite sure where to start...

Also, any suggestions for my Animation class? I feel like I should be using std::vector instead of a dynamic array of sprites.


EDIT: Maybe this should've been in the graphics section. Can someone move this?

EDIT 2: Arrghh! It's a null pointer. But why is it crashing before main() starts?