[mpich-devel] segfault calling neighbor collectives in communicator with no topology

Lisandro Dalcin dalcinl at gmail.com
Thu May 2 11:27:28 CDT 2013

On 2 May 2013 18:58, Dave Goodell <goodell at mcs.anl.gov> wrote:
> Thanks for letting us know.  I've created a ticket to track this and commented on your suggestions there:
> https://trac.mpich.org/projects/mpich/ticket/1833#comment:1

Thanks. BTW, you are right. This was indeed bad API usage from the
user. All neighbor collectives should check that the communicator is
an INTRAcommunicator with cart|graph|distgraph topology attached and
otherwise generate a proper error (of class MPI_ERR_COMM?)

Lisandro Dalcin
Predio CONICET-Santa Fe
Colectora RN 168 Km 472, Paraje El Pozo
3000 Santa Fe, Argentina
Tel: +54-342-4511594 (ext 1011)
Tel/Fax: +54-342-4511169

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