From 4be618b91d882c6b906e8f2a891c00be8cd50122 Mon Sep 17 00:00:00 2001
From: Emil Dotchevski <emil@revergestudios.com>
Date: Thu, 15 Mar 2012 02:13:52 +0000
Subject: [PATCH] Making clone_impl derive virtually from clone_base, so that
 calling boost::copy_exception with a type that already derives from
 clone_impl doesn't make pointer conversions to clone_impl ambiguous.

[SVN r77339]
---
 include/boost/exception/exception.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/exception/exception.hpp b/include/boost/exception/exception.hpp
index 8967754..42d2787 100644
--- a/include/boost/exception/exception.hpp
+++ b/include/boost/exception/exception.hpp
@@ -430,7 +430,7 @@ boost
         class
         clone_impl:
             public T,
-            public clone_base
+            public virtual clone_base
             {
             struct clone_tag { };
             clone_impl( clone_impl const & x, clone_tag ):