[vtkusers] GetEdgeData->Reset() breaks EdgeData

[David Doria]

It seems that after I call Reset(), I cannot add anything to the
EdgeData. The following examples shows that I add a length 2 weight
array to the graph, prove that it was added properly, Reset() the
EdgeData, then try to add the weight array again. This time, the graph
contains 0 weights after adding the weights array. The only reason I
started calling Reset is because in my filter the number of weights is
being reported incorrectly, I believe because it used to have a
"Weights" array, and I am trying to replace it with a new one.

Any thoughts?

#include <vtkSmartPointer.h>
#include <vtkDoubleArray.h>
#include <vtkDataSetAttributes.h>
#include <vtkMutableDirectedGraph.h>

int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkMutableDirectedGraph> dg =
      vtkSmartPointer<vtkMutableDirectedGraph>::New();

  vtkIdType v1 = dg->AddVertex();
  vtkIdType v2 = dg->AddChild(v1);

  vtkSmartPointer<vtkDoubleArray> weights =
      vtkSmartPointer<vtkDoubleArray>::New();
  weights->SetNumberOfComponents(1);
  weights->SetName("Weights");

  //set the edge weights
  weights->InsertNextValue(1.0);
  weights->InsertNextValue(2.0);

  cout << "Number of weights in array: " <<
weights->GetNumberOfTuples() << endl;

  //add the edge weight array to the graph
  dg->GetEdgeData()->AddArray(weights);

  cout << "Number of weights added: " <<
vtkDoubleArray::SafeDownCast(dg->GetEdgeData()->GetArray("Weights"))->GetNumberOfTuples()
<< endl;

  dg->GetEdgeData()->Reset();

  cout << "Number of weights: " <<
vtkDoubleArray::SafeDownCast(dg->GetEdgeData()->GetArray("Weights"))->GetNumberOfTuples()
<< endl;

  dg->GetEdgeData()->AddArray(weights);

  cout << "Number of weights added: " <<
vtkDoubleArray::SafeDownCast(dg->GetEdgeData()->GetArray("Weights"))->GetNumberOfTuples()
<< endl;

  return EXIT_SUCCESS;
}

Thanks,

David