From 967114eb315d7a87c19227dfa62ce78449c78414 Mon Sep 17 00:00:00 2001
From: Matthias Troyer <troyer@phys.ethz.ch>
Date: Mon, 26 Dec 2011 17:29:36 +0000
Subject: [PATCH] Added missing resize of vector, to become compatible with
 documentation

[SVN r76186]
---
 include/boost/mpi/collectives/gather.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/boost/mpi/collectives/gather.hpp b/include/boost/mpi/collectives/gather.hpp
index 4f39392..70dfd65 100644
--- a/include/boost/mpi/collectives/gather.hpp
+++ b/include/boost/mpi/collectives/gather.hpp
@@ -131,7 +131,12 @@ void
 gather(const communicator& comm, const T* in_values, int n, 
        std::vector<T>& out_values, int root)
 {
-  ::boost::mpi::gather(comm, in_values, n, &out_values[0], root);
+  if (comm.rank() == root) {
+    out_values.resize(comm.size() * n);
+    ::boost::mpi::gather(comm, in_values, n, &out_values[0], root);
+  } 
+  else
+    ::boost::mpi::gather(comm, in_values, n, root);
 }
 
 template<typename T>