implementation of the wall class and its child classes, as well as the stack itself.
here I add classes to the stack and using the isBuildingCorrectly function I check whether I can insert the next object, but when I access the fields of the object that is on the stack from the stack, an error is generated

interface.h

class Wall: public QObject {
    Q_OBJECT
public:
    double radiusInside;
    double radiusOutside;
    double Height;
    static int indexNumber;
    static double coordinateZ;
    QString name = "Wall";
    Wall();
    virtual ~Wall();
    friend double GeneratorMonteCarlo();
};

class Disk : public Wall {

public:
    double radiusInside;
    double radiusOutside;
    Disk(double radiusOutside, double radiusInside); // объявляем конструктор
    ~Disk(); // объявляем деструктор
    //const QString name = "Disk";
    int index;
};


class Сylinder : public Wall {

public:
    double radiusOutside;
    double Height;
    Сylinder(double radiusOutside, double height);
    ~Сylinder();
    //const QString name = "Cylinder";
    int index;
};

template <typename T>
class Stack {
private:
  std::stack<T*> elements;
public:
  Stack();
  void push(T* value){
      elements.push(value);
  }

  std::size_t Size() {
      return elements.size();
  }

  T* top() const {
      return elements.top();
  }

  void pop() {
      elements.pop();
  }

  bool empty() const {
      return elements.empty();
  }

  ~Stack() {
      while (!elements.empty()){
          delete elements.top();
         elements.pop();
      }
  }
};``` 

but after the element is added, I cannot access the fields of the object that was added, it throws an exception, but there is a way to output these variables, there will be garbage in them

` QString name = stack.top()->name;
    if (name == "Cylinder") {
        if ((selected_text == "Cylinder" && val1 == (stack.top()->radiusOutside)) ||
            (selected_text == "Disk" && val1 == (stack.top()->radiusOutside)) ||
            (selected_text == "Disk" && val2 == (stack.top()->radiusInside))) {
               return true;`