Bug fix, thanks to Nicolas LELONG, nlelong-at-mgdesign.org for the report.

[SVN r20401]

include/boost/python/object_core.hpp

@@ -280,7 +280,7 @@ namespace api
       return object_initializer<
           BOOST_DEDUCED_TYPENAME unwrap_reference<T>::type
       >::get(
-            api::do_unforward_cref(x)
+            x
           , is_obj()
       );
   }

test/object.cpp

@@ -6,9 +6,19 @@
 #include <boost/python/module.hpp>
 #include <boost/python/def.hpp>
 #include <boost/python/object.hpp>
+#include <boost/python/class.hpp>
 
 using namespace boost::python;
 
+class NotCopyable
+{
+} not_copyable;
+
+object ref_to_noncopyable()
+{
+  return object(boost::ref(not_copyable));
+}
+
 object call_object_3(object f)
 {
     return f(3);
@@ -281,6 +291,9 @@ bool check_inplace(object l, object o)
 
 BOOST_PYTHON_MODULE(object_ext)
 {
+    class_<NotCopyable, boost::noncopyable>("NotCopyable", no_init);
+
+    def("ref_to_noncopyable", ref_to_noncopyable);
     def("call_object_3", call_object_3);
     def("message", message);
     def("number", number);

test/object.py

@@ -1,5 +1,9 @@
 '''
 >>> from object_ext import *
+
+>>> class(ref_to_noncopyable())
+object_ext.NotCopyable
+
 >>> def print1(x):
 ...     print x
 >>> call_object_3(print1)