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Window / Application crashes when declaring sf::Window outside a function in debug mode

« on: May 29, 2016, 11:53:29 am »

I was trying to create a simple game and got stuck at the beginning. The app builds correctly and when launched throws exception with a message:

Exception thrown at 0x775F9F83 (ntdll.dll) in pong.exe: 0xC0000005: Access violation writing location 0x00000004.

Visual Studio Debugger points me at the line 6 in Window.cpp file ("This is the next statement to execute when this thread returns from the current function").

Apart from that I get IntelliSense errors only:

no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 89

no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 106

no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 133

no instance of constructor "sf::ContextSettings::ContextSettings" matches the argument list pong Window.hpp 151

I searched for solution here and at StackExchange and I discovered it's not advisable to declare sf::Window as global. I don't do this, but it seems simply declaring it outside a function causes problems. Still I'd really like to have this object as Window static class member when the project grows bigger.

I remember a year ago on some earlier version on SFML I was able to declare it in such way without any problems.

Problem occurs in debug mode only. Program executes just fine in Release mode.

Could you help me? I don't really know what I am doing wrong. Here are all project files at the moment.

main.cpp

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "App.h"
#include "Window.h"

int main()
{
    App::run();


    return 0;
}

App.h

class App
{
private:
    static void     loop();

public:
    static void     run();
};

App.cpp

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "Window.h"
#include "App.h"

void App::run()
{
    Window::initialize();

    loop();
}

void App::loop()
{
    while (Window::window.isOpen())
    {
        sf::Event event;
        while (Window::window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                Window::window.close();
        }
    }
}

Window.h

class Window
{

public:
    static void initialize();
    static sf::Window window;
};

Window.cpp

#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Network.hpp>
#include "Window.h"

sf::Window Window::window; // <--- This is the next statement to execute when this thread returns from the current function

void Window::initialize()
{
    window.create(sf::VideoMode::getDesktopMode(), "Pong");
}