PVS-Studio warning V558 for Geant4

template <typename T> GMocrenDataPrimitive<T> &
GMocrenDataPrimitive<T>::operator + (
  const GMocrenDataPrimitive<T> & _right)
{
  GMocrenDataPrimitive<T> rprim;
  ....
  return rprim;
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V558 Function returns the reference to temporary local object: rprim. G4GMocren g4gmocrenio.cc 131

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