Segmentation fault when raising Python error

In SignalManager::qt_metacall of signalmanager.cpp

PyErr_Restore might cause segment fault. Because it takes away a reference to each object that PyObject_Str(errValue) will fail

PyErr_Fetch alone should be suffice.

"you must own a reference to each object before the call and after the call you no longer own these references." – from Python doc site

PyObject *errType, *errValue, *errTraceback;
PyErr_Fetch(&errType, &errValue, &errTraceback);
PyErr_Restore(errType, errValue, errTraceback);

const QString errString = QLatin1String(Shiboken::String::toCString(PyObject_Str(errValue)));