[petsc-users] Bug report VecNorm

[Matthew Knepley]

On Sun, Dec 10, 2023 at 2:41 AM Stephan Köhler <
stephan.koehler at math.tu-freiberg.de> wrote:

> Dear PETSc/Tao team,
>
> there is a bug in the voector interface:  In the function
> VecNorm, see, eg.
> https://petsc.org/release/src/vec/vec/interface/rvector.c.html#VecNorm
> line 197 the check for consistency in line 214 is done on the wrong
> communicator.  The  communicator should be PETSC_COMM_SELF.
> Otherwise the program may hang when PetscCheck is executed.
>
> Please find a minimal example attached.
>

This is entirely right. I will fix it.

  Thanks,

     Matt


>
>
> Kind regards,
> Stephan Köhler
>
> --
> Stephan Köhler
> TU Bergakademie Freiberg
> Institut für numerische Mathematik und Optimierung
>
> Akademiestraße 6
> 09599 Freiberg
> Gebäudeteil Mittelbau, Zimmer 2.07
>
> Telefon: +49 (0)3731 39-3188 (Büro)
>
>

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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