Ah, I forgot. There is also QNanoPainter: https://github.com/QUItCoding/qnanopainter Haven't tried it myself, but I've heard a lot of good opinions about it.

Figured out my issue. I just needed to instantiate a QQmlDebuggingEnabler object. Calling QtQml.QQmlDebuggingEnabler() before instantiating my QApplication was enough.

@Solan
It will not work in debug mode because in Debug mode there some extra initializations that happen behind the scenes. If you heavily use the pointers the visual debuggers won't help you out.
For more information on this topic read about -Wall option in gcc for linux and go to msdn about debugger from microsoft windows.
If the code you are writing from scratch then please use latest conventions of new and delete.