hypertreegrid reader and writer leak memory
to reproduce, compiler paraview with VTK_DEBUG_LEAKS on make hypertreegridsource, 3x2x2, max depth 2, descriptor = "RR|........ ........" save to foo.htg quit paraview you get: Class "vtkHyperTreeGridNonOrientedCursor" has 2 instances still around. Class "vtkBitArray" has 4 instances still around. Class "vtkInformationDoubleVectorValue" has 2 instances still around. Class "vtkDoubleArray" has 4 instances still around. Class "9vtkBufferIdE" has 4 instances still around. Class "vtkInformation" has 8 instances still around. Class "vtkInformationVector" has 2 instances still around.
restore paraview, read foo.htg quit paraview you get: Class "vtkBitArray" has 2 instances still around.