[Spirit Development] Bug using Phoenix::new_ in Qi semantic actions.

I am trying to create a parser that constructs objects on the heap
instead of the stack so I can use polymorphic pointers.  The natural
way to implement this seemed to be using the Object classes in
phoenix.

Why doesn't the following compile?  Is it a bug, or am I using new_ incorrectly?


#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/home/phoenix/object/new.hpp>

int main()
{
  using namespace boost::spirit::qi;
  using namespace boost::phoenix;
  boost::spirit::qi::rule<std::string::const_iterator,int*()> rule =
eps[_val = new_<int>(5)];
}

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#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/home/phoenix/object/new.hpp>

int main()
{
  using namespace boost::spirit::qi;
  using namespace boost::phoenix;
  boost::spirit::qi::rule<std::string::const_iterator,int*()> rule = eps[_val = new_<int>(5)];
}