QSA's children objects deletion problem

Question

I've some problems with deleting QSA's referred objects. In constructor, I've wrote:

  QSProject * project = {initialization of QSProject}
  MyWrapper * wrapper = new MyWrapper; // MyWrapper is QObject's child. It comes without parent here
  project->addObject(wrapper);

I've wrote in descructor:

  project->clearObjects();
  delete project;
  delete wrapper;

This code cause to segfault at destructor's execution, exactly -- when I'm trying to delete wrapper.

I've made some research and I know that:

1. QSProject doesn't delete his "children objects", so this is not a "double delete" problem
2. If I don't add wrapper to QSProject in constructor, it works well.
3. If I don't delete wrapper in descructor, it works well (but memory leaks).

What's up?

Answer 1

First, I'm not familiar with QSA, but given how the Qt API usually works QSProject is likely taking ownership of the object. This means QSProject is reparenting the object using QObject::setParent().

In which case you are doubly deleting the object.

Have you verified with a tool such as valgrind that you are in fact leaking memory when you omit the delete?