[Bug 2058415] Re: Reading binary data in paraview broken by libexpat1 update

[Peter Heywood]

VTK has been patched upstream to correctly handle AppendedData elements
in .vtu files  with the updated/patched libexpat1:


https://gitlab.kitware.com/vtk/vtk/-/commit/db8f9efca220c9d16a30958e179abae3379d0011

https://gitlab.kitware.com/vtk/vtk/-/issues/19258

This will need backporting to older VTK releases on ubuntu's where
libexpat1's fixes have been backported, which if I'm reading the ubuntu
package release dates correctly is Jammy(security, updates), Mantic
(security, updates) and potentially Noble (release).

** Bug watch added: gitlab.kitware.com/vtk/vtk/-/issues #19258
   https://gitlab.kitware.com/vtk/vtk/-/issues/19258

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Title:
  Reading binary data in paraview broken by libexpat1 update

Status in dune-grid package in Ubuntu:
  New
Status in expat package in Ubuntu:
  Confirmed
Status in paraview package in Ubuntu:
  Confirmed

Bug description:
  The recent update of libexpat1 to version 2.5.0-2ubuntu0.1 broke Paraview. 
  In particular reading vtu files containing binary data fails since this update. When trying to open files that worked fine before, Paraview now reports a parsing error like this one:

  ERROR: In vtkXMLParser.cxx, line 376
  vtkXMLDataParser (0x5b0ac36fc970): Error parsing XML in stream at line 21, column 0, byte index 1036: not well-formed (invalid token)

  ERROR: In vtkXMLReader.cxx, line 521
  vtkXMLUnstructuredGridReader (0x5b0ac3d3b670): Error parsing input file.  ReadXMLInformation aborting.

  The problem disappears when reverting libexpat1 to version 2.5.0-2.

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