[petsc-users] Bug report VecNorm

[Pierre Jolivet]

> On 10 Dec 2023, at 8:40 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.

I think the communicator should not be changed, but instead, the check/conditional should be changed, à la PetscValidLogicalCollectiveBool().

Thanks,
Pierre

> Please find a minimal example attached.
> 
> 
> 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)
> <minimal_ex_vec_norm.cpp><OpenPGP_0xC9BF2C20DFE9F713.asc>

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