[boost] [type_erasure]any(const binding<Concept>&, ...) compile error

Subject: [boost] [type_erasure]any(const binding<Concept>&, ...) compile error
From: Larry Evans (cppljevans_at_[hidden])
Date: 2012-07-26 08:29:57

The attached, when compiled with with gcc4.8-20120624,
produces compile error:

../../../boost/type_erasure/detail/construct.hpp: In instantiation of
'boost::type_erasure::any<Concept, T>::any(const
boost::type_erasure::binding<Concept>&, U0&) [with U0 =
value<boost::type_erasure::_a>; Concept =
boost::mpl::vector<boost::type_erasure::copy_constructible<boost::type_erasure::_a>,
boost::type_erasure::copy_constructible<boost::type_erasure::_b> >; T =
boost::type_erasure::_a]':
binding_of.cpp:71:32:   required from here
../../../boost/type_erasure/detail/construct.hpp:99:9: error: invalid
use of void expression
         )
         ^

Am I doing something wrong?

TIA.

-Larry