From a4701fa0772b9c3ddf072276eac10e17fe59a9ee Mon Sep 17 00:00:00 2001
From: Sam White <white67@illinois.edu>
Date: Wed, 19 Jul 2017 13:17:30 -0500
Subject: [PATCH] AMPI: handle MPI_PROC_NULL entries in
 MPI_Group_translate_ranks

Change-Id: I1b30a9d9707325cb5a07535dcf13b5e69dbcbd26
---
 src/libs/ck-libs/ampi/ampiimpl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libs/ck-libs/ampi/ampiimpl.h b/src/libs/ck-libs/ampi/ampiimpl.h
index 238962a80d..b36dda2a2e 100644
--- a/src/libs/ck-libs/ampi/ampiimpl.h
+++ b/src/libs/ck-libs/ampi/ampiimpl.h
@@ -509,7 +509,7 @@ inline groupStruct diffOp(groupStruct vec1, groupStruct vec2){
 
 inline int* translateRanksOp(int n,groupStruct vec1,const int* ranks1,groupStruct vec2, int *ret){
   for(int i=0;i<n;i++){
-    ret[i] = getPosOp(vec1[ranks1[i]],vec2);
+    ret[i] = (ranks1[i] == MPI_PROC_NULL) ?  MPI_PROC_NULL : getPosOp(vec1[ranks1[i]],vec2);
   }
   return ret;
 }
-- 
2.11.4.GIT