There is an 'if' condition with an assignment and a nullptr check, then if the just assigned value is null, the variable is used.
I discovered this accidentally when I was browsing the code. It did not cause a crash for me, probably the condition never fulfills.
if ((surfacecreatorprop.IsNull()) || (surfacecreatorprop->GetSmartPointer().IsNull()) ||
((m_SurfaceCreator =
dynamic_cast<PlaneGeometryDataToSurfaceFilter *>(surfacecreatorprop->GetSmartPointer().GetPointer()))
.IsNull()))
{
m_SurfaceCreator->PlaceByGeometryOn();
surfacecreatorprop = SmartPointerProperty::New(m_SurfaceCreator);
GetDataNode()->SetProperty("surfacegeometry", surfacecreatorprop);
}