* Fix uninitialized variable warning. Technically, start's group should be

a subset of win's group, so this should never happen.  But users have
  been known to screw up before, so return a reasonable error.

This commit was SVN r8855.

ompi/mca/osc/pt2pt/osc_pt2pt_sync.c

@@ -213,7 +213,7 @@ ompi_osc_pt2pt_module_complete(ompi_win_t *win)
     /* for each process in group, send a control message with number
        of updates coming, then start all the requests */
     for (i = 0 ; i < ompi_group_size(P2P_MODULE(win)->sc_group) ; ++i) {
-        int comm_rank, j;
+        int comm_rank = -1, j;
         opal_list_item_t *item;
         opal_list_t *req_list;
         /* no need to increment ref count - the communicator isn't
@@ -231,6 +231,10 @@ ompi_osc_pt2pt_module_complete(ompi_win_t *win)
                 break;
             }
         }
+        if (comm_rank == -1) {
+            ret = MPI_ERR_RMA_SYNC;
+            goto cleanup;
+        }
 
         req_list = &(P2P_MODULE(win)->p2p_pending_out_sendreqs[comm_rank]);