Bug ticket 3641, also merging other fixes from the Release branch.

[SVN r57765]

include/boost/exception/detail/exception_ptr_base.hpp

@@ -19,6 +19,13 @@ boost
 
                         virtual void _rethrow() const=0;
                         virtual bool _empty() const=0;
+
+                        protected:
+
+                        virtual
+                        ~exception_ptr_base() throw()
+                            {
+                            }
                         };
                 }
     }

include/boost/exception_ptr.hpp

@@ -90,6 +90,10 @@ boost
             {
             }
 
+        ~exception_ptr() throw()
+            {
+            }
+
         operator unspecified_bool_type() const
             {
             return _empty() ? 0 : &exception_ptr::bad_alloc_;