From eb1f261aec236c177bcf1a6af7fb469cbbcaa95e Mon Sep 17 00:00:00 2001
From: Augustin Degomme <augustin.degomme@unibas.ch>
Date: Tue, 10 Apr 2018 20:21:37 +0200
Subject: [PATCH] only test for these on non-root processes

---
 src/smpi/bindings/smpi_pmpi_coll.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/smpi/bindings/smpi_pmpi_coll.cpp b/src/smpi/bindings/smpi_pmpi_coll.cpp
index 9b9fa96dfe..b4a298c00a 100644
--- a/src/smpi/bindings/smpi_pmpi_coll.cpp
+++ b/src/smpi/bindings/smpi_pmpi_coll.cpp
@@ -122,7 +122,7 @@ int PMPI_Gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recv
     retval = MPI_ERR_TYPE;
   } else if (( sendbuf != MPI_IN_PLACE) && (sendcount <0)){
     retval = MPI_ERR_COUNT;
-  } else if (recvcounts == nullptr || displs == nullptr) {
+  } else if ((comm->rank() == root) && (recvcounts == nullptr || displs == nullptr)) {
     retval = MPI_ERR_ARG;
   } else {
     char* sendtmpbuf = static_cast<char*>(sendbuf);
-- 
2.20.1