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Bug#1114938: dune-grid: FTBFS in bookworm: Test #8: subsamplingvtktest ....................................***Failed

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On 12.09.25 17:58, Santiago Vila wrote:
> On Fri, Sep 12, 2025 at 04:58:33PM +0200, Markus Blatt wrote:
>
>> This is bug 1064762 that has now probably been added to bookworm by a patch
>> to vtk9.
>>
>> I can work around this here by simply deactivating test, but this kind of
>> reading of the vtk files I cannot fix here. dune-grid just writes those
>> files.
>>
>> The underlying problem can only be fixed in VTK. though. It might affect
>> other packes.
>>
>> How should we proceed?
> I think it all depends on much effort we[*] are willing to make.
>
> At this point in the life of bookworm (which is 2/3 of its supported
> period), there are already at least 60 different ftbfs bugs, so I
> would say that fixing the FTBFS problem alone (disabling the offending
> tests, if that's your plan and you know how to do it) would be more
> than acceptable and a lot better than nothing.

I'll start with that then.

This will leave the main problem, though:

Due to the security fix in expat [1], you will not be able to process 
any binary vtk files in bookworm
(e.g. visualize them in paraview) anymore.

To fix that we would need to backport [2] to vtk9

[1] 
https://tracker.debian.org/news/1647706/accepted-expat-250-1deb12u2-source-into-proposed-updates/

[2]<https://gitlab.kitware.com/vtk/vtk/-/issues/19258#note_1510307>https://gitlab.kitware.com/vtk/vtk/-/commit/db8f9efca220c9d16a30958e179abae3379d0011

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Bug#1114938: dune-grid: FTBFS in bookworm: Test #8: subsamplingvtktest ....................................***Failed Markus Blatt <markus@dr-blatt.de> - 2025-09-12 17:30 +0200
  Bug#1114938: dune-grid: FTBFS in bookworm: Test #8: subsamplingvtktest ....................................***Failed Markus Blatt <markus@dr-blatt.de> - 2025-09-15 08:30 +0200
  Bug#1114938: Alternative workaround in dune-grid for ftbfs Markus Blatt <markus@dr-blatt.de> - 2025-09-16 19:10 +0200
  Bug#1114938: patch available for vtk9 in bookworm (was Re: Bug#1114938: dune-grid: FTBFS in bookworm: Test #8: subsamplingvtktest ....................................***Failed) Santiago Vila <sanvila@debian.org> - 2025-09-16 20:20 +0200
    Bug#1114938: patch available for vtk9 in bookworm (was Re: Bug#1114938: dune-grid: FTBFS in bookworm: Test #8: subsamplingvtktest ....................................***Failed) Markus Blatt <markus@dr-blatt.de> - 2025-09-16 21:00 +0200

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