sf::Shape::setOutlineThickness() function causes program crash

[lesnoy]

Hi, I'm learning SFML and practicing in creating some GUI elements like buttons. Here I have my Abstract_button class constructor.

//Abstract_button is virtually inherited from sf::Shape so I can call its functions
Abstract_button::Abstract_button()
{
        /*...insignifacant details unrelated to the problem...*/

        setFillColor(style()->normal_fill_color());
        setOutlineColor(style()->normal_outline_color());

        //the following line causes program crash
        setOutlineThickness(style()->normal_outline_thickness());
}

The problem is when I call setOutlineThickness() function from this constructor, program crashes for no obvious reason.

Unhandled exception at 0x747824CB(ucrtbase.dll) in GUI_element.exe: Fatal program exit requested.

This address is the same every time I run the program.
Calling setOutlineThickness() function from member functions or derived class constructor doesn't cause the crash. Calling similar functions like setFillColor() also doesn't result in any unwanted behavior.

//Rect_button is inherited from my Abstract_button class and sf::RectangleShape
Rect_button::Rect_button(const Point& pos, const Size& size)
        :RectangleShape(size)
{
        setPosition(pos);

        //if I put the following code line into this constructor,
        //program will work without any problems
        setOutlineThickness(style()->normal_outline_thickness());
}

I think I should say that I use a little bit modified version of SFML. I edited source code and rebuilt library so sf::RectangleShape is virtually inherited from sf::Shape. I don't think this might result in crashes but I think I should give this information just in case.

[eXpl0it3r]

Best to use a debugger, find the place it crashes and the call stack.

[lesnoy]

Program crashes exactly in the specific place into the Abstract_button constructor when setOutlineThickness() is called. Unfortunately I have no idea what causes such specific error and debugger can't help me more in that although I know what code causes crash.

[eXpl0it3r]

Without call stack, I also can't pin point any potential locations inside of SFML.

[lesnoy]

Now I have one more problem. I built .pdb files and put them into the directory with .exe file so I can get
information about SFML function calls, but it seems like Visual Studio doesn't even see these files.

Frames below may be incorrect and/or missing, no symbols loaded for sfml-graphics-2.dll   

Might it be caused by building project in Release mode? What could I do to fix this?

[eXpl0it3r]

Run it in debug mode with debug SFML libraries?