The code generated by shiboken has setParent twice in some cases.

ex: QToolbar.addAction

          case 3: // addAction(QString)
            {
                QString cppArg0 = Shiboken::Converter<QString
>::toCpp(pyargs[0]);

                if(!PyErr_Occurred()) {
                    // addAction(QString)
                    PyThreadState* _save = PyEval_SaveThread(); //
Py_BEGIN_ALLOW_THREADS
                    QAction * cppResult = cppSelf->addAction(cppArg0);
                    PyEval_RestoreThread(_save); // Py_END_ALLOW_THREADS
                    pyResult = Shiboken::Converter< ::QAction *
>::toPython(cppResult);
                    Shiboken::Object::setParent(self, pyResult);
                    Shiboken::Object::setParent(self, pyResult);
                }
                break;
            }