[OMPI devel] malloc(0) warning with 1.8.7

[Lisandro Dalcin]

Using a debug build of 1.8.7, I'm still getting this malloc(0) warning:

malloc debug: Request for 0 bytes (coll_libnbc_ireduce_scatter_block.c, 67)

The simple code below should reproduce it:

$ cat ireduce_scatter_block.c
#include <mpi.h>
int main(int argc, char *argv[])
{
  MPI_Request request;
  MPI_Init(&argc, &argv);
  MPI_Ireduce_scatter_block(NULL, NULL, 0, MPI_INT,
                            MPI_SUM, MPI_COMM_SELF, &request);
  MPI_Wait(&request, MPI_STATUS_IGNORE);
  MPI_Finalize();
  return 0;
}

$ mpicc ireduce_scatter_block.c
$ mpiexec -n 1 ./a.out
malloc debug: Request for 0 bytes (coll_libnbc_ireduce_scatter_block.c, 67)


-- 
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/

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