[vtk-developers] Failing Test: TestDescriptiveStatistics needs attention

[Dave Partyka]

Hi Bill,

I emailed Philippe the day this broke but have not heard back from him. I
typically don't cc the vtk list when sending a rubber chicken to those who
break the dashboard ;-). I suspect he is gone for the holidays so I will
just disable this test for the time being.

On Mon, Dec 28, 2009 at 12:10 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> Folks,
>
> The subject test is failing on many platforms:
>
> http://www.cdash.org/CDash/testSummary.php?project=11&name=Infovis-TestDescriptiveStatistics&date=2009-12-28
>
> According to cdash, the test has been failing since Dec 22 when these
> files were checked in:
> http://www.cdash.org/CDash/viewUpdate.php?buildid=499182
>
> This continuous build was the first to notice the problem:
> http://www.cdash.org/CDash/viewTest.php?onlyfailed&buildid=498908
>
> I ran the test in the debugger and here is the failing statement:
> Program received signal SIGFPE, Arithmetic exception.
> 0x0095f351 in vtkDescriptiveStatistics::Test (this=0x8764fe8,
>    inData=0x87642a0, inMetaDO=0x8766f40, outMetaDO=0x87672b0)
>    at
> /home/lorensen/Projects/VTKHead/Infovis/vtkDescriptiveStatistics.cxx:536
> 536         double s = sqrt( n / ( m22 * m2 ) ) * m3;
>
> This is a result of
> Warning: In
> /projects/kmorel/dashboard/VTK/Infovis/vtkDescriptiveStatistics.cxx,
> line 282
> vtkDescriptiveStatistics (0x59a0c0): InData table does not have a
> column Metric 3. Ignoring it.
>
> Warning: In
> /projects/kmorel/dashboard/VTK/Infovis/vtkUnivariateStatisticsAlgorithm.cxx,
> line 122
> vtkDescriptiveStatistics (0x59a0c0): InData table does not have a
> column Metric 3. Ignoring it.
>
>
> The test purposely adds a bogus column. This causes the zero divide.
> Since VTK does not throw exceptions, the bad data needs to be handled
> in an alternative way to avoid the 0 divide.
>
> It is easy to miss a defect like this because the vtk dashboard seems
> to have many tests failing on a continuing basis.
>
> Bill
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