#include <QApplication>
#include <QWidget>
#include <QPainter>

class TextWidget : public QWidget {
protected:
    void paintEvent(QPaintEvent *event) override {
        QPainter painter(this);
        painter.setPen(Qt::black);
        //painter.setFont(QFont("BentonSans Book", 20));   // this font lead to Debug Assert
        painter.setFont(QFont("Arial", 20));           // this font works fine
        painter.drawText(rect(), Qt::AlignCenter, "Hello, Qt!");
    }

public:
    TextWidget(QWidget *parent = nullptr) : QWidget(parent) {
        setWindowTitle("Qt drawText Example");
        resize(400, 300);
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    TextWidget window;
    window.show();
    return app.exec();
}