Re: [OMPI devel] regression: MPI_Neighbor_alltoall with empty graph

2016-11-12 Thread Pritchard Jr., Howard
ts.open-mpi.org>> Date: Saturday, November 12, 2016 at 7:40 AM To: "devel@lists.open-mpi.org<mailto:devel@lists.open-mpi.org>" mailto:devel@lists.open-mpi.org>> Cc: "Roberts, Nathan V" mailto:nvro...@sandia.gov>>, "Thomas E. Voth" mailto:tev...@softwa

[OMPI devel] regression: MPI_Neighbor_alltoall with empty graph

2016-11-12 Thread Ibanez, Daniel Alejandro
Hello, I'd like to report a bug with OpenMPI version 2.0.1. Attached to this email is a C program that runs with only one MPI rank, uses MPI_Dist_graph_create to create a graph topology with no communication edges, and then uses MPI_Neighbor_alltoall with that graph topology. This results in