diff --git a/include/boost/exception/detail/attribute_noreturn.hpp b/include/boost/exception/detail/attribute_noreturn.hpp
index f6a0b59..ae9f031 100644
--- a/include/boost/exception/detail/attribute_noreturn.hpp
+++ b/include/boost/exception/detail/attribute_noreturn.hpp
@@ -9,7 +9,7 @@
 #if defined(_MSC_VER)
 #define BOOST_ATTRIBUTE_NORETURN __declspec(noreturn)
 #elif defined(__GNUC__)
-#define BOOST_ATTRIBUTE_NORETURN __attribute__((noreturn))
+#define BOOST_ATTRIBUTE_NORETURN __attribute__((__noreturn__))
 #else
 #define BOOST_ATTRIBUTE_NORETURN
 #endif
diff --git a/include/boost/exception/error_info.hpp b/include/boost/exception/error_info.hpp
index 2e6832a..03b3da8 100644
--- a/include/boost/exception/error_info.hpp
+++ b/include/boost/exception/error_info.hpp
@@ -3,4 +3,7 @@
 //Distributed under the Boost Software License, Version 1.0. (See accompanying
 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#ifndef UUID_EE7ECCA0433B11E1923E37064924019B
+#define UUID_EE7ECCA0433B11E1923E37064924019B
 namespace boost { template <class Tag,class T> class error_info; }
+#endif
diff --git a/include/boost/exception/exception.hpp b/include/boost/exception/exception.hpp
index 9cdfd5c..42d2787 100644
--- a/include/boost/exception/exception.hpp
+++ b/include/boost/exception/exception.hpp
@@ -310,6 +310,11 @@ boost
     namespace
     exception_detail
         {
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility push (default)
+# endif
+#endif
         template <class T>
         struct
         error_info_injector:
@@ -326,6 +331,11 @@ boost
                 {
                 }
             };
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility pop
+# endif
+#endif
 
         struct large_size { char c[256]; };
         large_size dispatch_boost_exception( exception const * );
@@ -373,6 +383,11 @@ boost
     namespace
     exception_detail
         {
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility push (default)
+# endif
+#endif
         class
         clone_base
             {
@@ -386,6 +401,11 @@ boost
                 {
                 }
             };
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility pop
+# endif
+#endif
 
         inline
         void
@@ -410,8 +430,15 @@ boost
         class
         clone_impl:
             public T,
-            public clone_base
+            public virtual clone_base
             {
+            struct clone_tag { };
+            clone_impl( clone_impl const & x, clone_tag ):
+                T(x)
+                {
+                copy_boost_exception(this,&x);
+                }
+
             public:
 
             explicit
@@ -430,7 +457,7 @@ boost
             clone_base const *
             clone() const
                 {
-                return new clone_impl(*this);
+                return new clone_impl(*this,clone_tag());
                 }
 
             void
diff --git a/include/boost/exception/info.hpp b/include/boost/exception/info.hpp
index 5530746..7b56076 100644
--- a/include/boost/exception/info.hpp
+++ b/include/boost/exception/info.hpp
@@ -97,7 +97,7 @@ boost
                     {
                     shared_ptr<error_info_base> const & p = i->second;
 #ifndef BOOST_NO_RTTI
-                    BOOST_ASSERT( BOOST_EXCEPTION_DYNAMIC_TYPEID(*p).type_==ti.type_ );
+                    BOOST_ASSERT( *BOOST_EXCEPTION_DYNAMIC_TYPEID(*p).type_==*ti.type_ );
 #endif
                     return p;
                     }
diff --git a/include/boost/exception/info_tuple.hpp b/include/boost/exception/info_tuple.hpp
index 34afe42..bf1be15 100644
--- a/include/boost/exception/info_tuple.hpp
+++ b/include/boost/exception/info_tuple.hpp
@@ -18,6 +18,30 @@
 namespace
 boost
     {
+    template <
+        class E >
+    inline
+    E const &
+    operator<<(
+        E const & x,
+        tuple< > const & v )
+        {
+        return x;
+        }
+
+    template <
+        class E,
+        class Tag1,class T1 >
+    inline
+    E const &
+    operator<<(
+        E const & x,
+        tuple<
+            error_info<Tag1,T1> > const & v )
+        {
+        return x << v.template get<0>();
+        }
+
     template <
         class E,
         class Tag1,class T1,