double QLabel declaration problem

[Pawello]

Hi, I've found strange problem in my program.

I can declare one Qlabel item, but declaring another one is connected with compilation error (file-build-desktop-....\debug\file.exe ends with code -1073741819 instead of 0).

file.h

#include <QLabel>
 
class N : public QWidget
  {
  Q_OBJECT
  public:
  N(QWidget *parent = 0);
  private:
  QLabel *firstlabel;
  QLabel *secondlabel;
  }

#include <QLabel>

class N : public QWidget
  {
  Q_OBJECT
  public:
  N(QWidget *parent = 0);
  private:
  QLabel *firstlabel;
  QLabel *secondlabel;
  }

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[Zlatomir]

That looks like access violation (segmentation fault), make sure you initialize the pointer secondlabel before you try to use it, or show us the code from the .cpp file if you need more help.

[Pawello]

This problem appears even without using secondlabel in program, that's why it seems to be strange for me:/

[ZikO]

I had the same error you indicated and it was when I forgot to initialize a pointer before using it. Sometimes this mistake happens to me when I add/remove lines and somehow remove the part where I did have a pointer initialized.

[spirit]

This problem appears even without using secondlabel in program, that's why it seems to be strange for me:/

Show us cpp file.

[Lykurg]

Or even better: Just debug your application!

[Pawello]

As I said, problem appeared even without anything in cpp file. But I solved it. I made new identical project, copied code from all files and compliled it... and now it works. I don't understand it, but now it doesn't matter. Thanks for help