While I agree that the code below is rather useless, however I'm not
sure it should actually fail:
$ cat comm_split_type.c
#include <assert.h>
#include <mpi.h>
int main(int argc, char *argv[])
{
MPI_Comm comm;
MPI_Init(&argc, &argv);
MPI_Comm_split_type(MPI_COMM_SELF,MPI_UNDEFINED,0,MPI_INFO_NULL,&comm);
assert(comm == MPI_COMM_NULL);
MPI_Finalize();
return 0;
}
$ mpicc comm_split_type.c
$ ./a.out
[kw2060:9865] *** An error occurred in MPI_Comm_split_type
[kw2060:9865] *** reported by process [140735368986625,140071768424448]
[kw2060:9865] *** on communicator MPI_COMM_SELF
[kw2060:9865] *** MPI_ERR_ARG: invalid argument of some other kind
[kw2060:9865] *** MPI_ERRORS_ARE_FATAL (processes in this communicator
will now abort,
[kw2060:9865] *** and potentially your MPI job)
--
Lisandro Dalcin
============
Research Scientist
Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)
Numerical Porous Media Center (NumPor)
King Abdullah University of Science and Technology (KAUST)
http://numpor.kaust.edu.sa/
4700 King Abdullah University of Science and Technology
al-Khawarizmi Bldg (Bldg 1), Office # 4332
Thuwal 23955-6900, Kingdom of Saudi Arabia
http://www.kaust.edu.sa
Office Phone: +966 12 808-0459
