QList can't be returned

[baluk]

I have a problem when returning QList from a fucntion. I have two classes in which one class returns a QList from a fucntion and the other class catches this list. But I get null List returned though list in the other class has values. Below is my classes overview.

class A
{
   classB *b;
  void f()
   QList<QString>* list = b->function();
   qDebug() << list.at(0); // getting error
}
 
class B
{
 QList<QString> Blist;
    void list()
    {
         int i=0;
        .....
         Blist.insert(i,"value");
         qDebug() << Blist.at(i);
        i++;
     }
  QList<QString>* function()
  {
     qDebug() << Blist.at(0) ; // printing the value at index 0
      return &Blist;
  }
}

class A
{
   classB *b;
  void f()
   QList<QString>* list = b->function();
   qDebug() << list.at(0); // getting error
}

class B
{
 QList<QString> Blist;
    void list()
    {
         int i=0;
        .....
         Blist.insert(i,"value");
         qDebug() << Blist.at(i);
        i++;
     }
  QList<QString>* function()
  {
     qDebug() << Blist.at(0) ; // printing the value at index 0
      return &Blist;
  }
}

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Can any one please tell me why I am getting null list returned.

Thank You,
Baluk