[petsc-dev] MatSetPreallocationCOO remove attached objects?

[Mark Adams]

If it's tricky I would just throw an error if there are attached objects.
It was easy for me to work around it.
Worry about it later.

On Tue, Mar 1, 2022 at 5:49 PM Junchao Zhang <junchao.zhang at gmail.com>
wrote:

> I met errors and I don't know how to fix them,
> https://gitlab.com/petsc/petsc/-/jobs/2151255655
> The errors are all hypre-related.  @Stefano Zampini
> <stefano.zampini at gmail.com>  might know more.
> Perhaps we can assert in MatHeaderMerge(A,C) and A does not contain
> composed objects?  MatHeaderMerge() is so vague on what will be kept and
> what will be discarded.
>
> --Junchao Zhang
>
>
> On Tue, Mar 1, 2022 at 3:00 PM Mark Adams <mfadams at lbl.gov> wrote:
>
>> I can attach my containers (3!) after this call.
>> Actually better structure in my code but this should be fixed.
>> Thanks
>>
>> On Tue, Mar 1, 2022 at 3:06 PM Barry Smith <bsmith at petsc.dev> wrote:
>>
>>>
>>>   These might not need to be deleted but could possibly be moved over
>>>
>>> ierr = PetscFunctionListDestroy(&((PetscObject)A)->qlist);CHKERRQ(ierr);
>>>   ierr = PetscObjectListDestroy(&((PetscObject)A)->olist);CHKERRQ(ierr);
>>>   ierr = PetscComposedQuantitiesDestroy((PetscObject)A);CHKERRQ(ierr);
>>>
>>> also MatHeaderReplace() exists. I struggle to understand the exact
>>> differences and why both exist but I think there are some subtle reasons
>>> why there are both and don't know if they can be merged.
>>>
>>> On Mar 1, 2022, at 2:47 PM, Junchao Zhang <junchao.zhang at gmail.com>
>>> wrote:
>>>
>>> I realized this problem but did not expect someone would run into it :)
>>> Let me think again.
>>>
>>> --Junchao Zhang
>>>
>>>
>>> On Tue, Mar 1, 2022 at 1:33 PM Mark Adams <mfadams at lbl.gov> wrote:
>>>
>>>> I have a container attached to my matrix and it seems to go away after
>>>> a call to MatSetPreallocationCOO.
>>>> Does that sound plausible?
>>>>
>>>
>>>
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