- int *srcs = xbt_new0(int, count);
- int *dsts = xbt_new0(int, count);
- int *recvs = xbt_new0(int, count);
- MPI_Comm *comms = xbt_new0(MPI_Comm, count);
-
+ int *srcs = NULL, *dsts = NULL, *recvs = NULL;
+ MPI_Comm* comms = NULL;
+ if(count>0){
+ srcs = xbt_new0(int, count);
+ dsts = xbt_new0(int, count);
+ recvs = xbt_new0(int, count);
+ comms = xbt_new0(MPI_Comm, count);
+ }