Hello,

Seems trivial problem, but do not understand why this happens?
Simple program crashes on " menuBar()->addMenu(file_menu_); "

Any suggestion?

Qt Code: 
  1. class PhotoWarperWindow : public QMainWindow
  2. {
  3.   Q_OBJECT
  4. }
  5.  
  6. PhotoWarperWindow::PhotoWarperWindow(void)
  7. {
  8.   QWidget *widget = new QWidget;
  9.  
  10.   setCentralWidget(widget);
  11.  
  12.   QVBoxLayout *layout = new QVBoxLayout;
  13.  
  14.   layout->setMargin(5);
  15.  
  16.   widget->setLayout(layout);
  17.  
  18.   //CreateActions();
  19.   CreateMenus();
  20.  
  21.   setWindowTitle(QString::fromUtf8("Menus"));
  22.   setMinimumSize(160, 160);
  23.   resize(480, 320);
  24. }
  25.  
  26. void PhotoWarperWindow::CreateMenus()
  27. {
  28.   QMenuBar *mb =  menuBar();
  29.  
  30.   file_menu_ = new QMenu(menuBar());
  31.  
  32.   menuBar()->addMenu(file_menu_);  <- PROGRAM CRASH HERE
  33. }
  34.  
  35.  
  36. int main(int argc, char* argv[])
  37. {
  38.   QApplication app(argc, argv);
  39.  
  40.   PhotoWarperWindow window;
  41.  
  42.   window.show();
  43.  
  44.   return app.exec();
  45. }
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