From 6719e56b5bfe9ae4badc9a6e894c5824f663d62e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Sun, 11 Aug 2013 17:52:43 +0200
Subject: Ref<> objects must be nested by reference because they potentially
 store a temporary object

---
 Eigen/src/Core/Ref.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'Eigen/src/Core/Ref.h')

diff --git a/Eigen/src/Core/Ref.h b/Eigen/src/Core/Ref.h
index aba795bdb..00d9e6d2b 100644
--- a/Eigen/src/Core/Ref.h
+++ b/Eigen/src/Core/Ref.h
@@ -94,7 +94,8 @@ struct traits<Ref<_PlainObjectType, _Options, _StrideType> >
   typedef _PlainObjectType PlainObjectType;
   typedef _StrideType StrideType;
   enum {
-    Options = _Options
+    Options = _Options,
+    Flags = traits<Map<_PlainObjectType, _Options, _StrideType> >::Flags | NestByRefBit
   };
 
   template<typename Derived> struct match {
@@ -111,7 +112,7 @@ struct traits<Ref<_PlainObjectType, _Options, _StrideType> >
     };
     typedef typename internal::conditional<MatchAtCompileTime,internal::true_type,internal::false_type>::type type;
   };
-
+  
 };
 
 template<typename Derived>
-- 
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