Here is attached an oversimplified version of the MPI_Recv_init_null_c
test from the
intel test suite.
the test works fine with v1.6, v1.7 and v1.8 branches but fails with the
i wonder wether the bug is in OpenMPI or the test itself.
on one hand, we could consider there is a bug in OpenMPI :
status.MPI_SOURCE should be MPI_PROC_NULL since we explicitly posted a
recv request with MPI_PROC_NULL.
on the other hand, (mpi specs, chapter 3.7.3 and
we could consider the returned value is not significant, and hence
MPI_Wait should return an
empty status (and empty status has source=MPI_ANY_SOURCE per the MPI specs).
for what it's worth, this test is a success with mpich (e.g.
status.MPI_SOURCE is MPI_PROC_NULL).
what is the correct interpretation of the MPI specs and what should be
(e.g. fix OpenMPI or fix/skip the test ?)