g++ compile-time error with template arguments in 4.0 CVS?

[Benjamin Redelings I <bredelin at ucla dot edu>]

Hi,

	I have a reduced testcase from BOOST that fails with yesterdays CVS 
(4.0.0 20050214 (experimental)), but compiles under 3.4.  I don't know 
if this is a bug in BOOST or in g++:

------------------ begin testcase
template< typename T, T N >
struct integral_c
{
  static const T value = N;

  typedef integral_c< T, static_cast<T>((value + 1)) > next;
  //  typedef integral_c< T, static_cast<T>((value - 1)) > prior;

  //  operator T() const { return static_cast<T>(this->value); }
};
------------------- end testcase
% g++-cvs testcase.C
c.C:6: error: template argument 2 is invalid

Note that simply replacing 'value' by 'N' make this compile.

The original error was obtained by including 
<boost/numeric/ublas/matrix.hpp>
The following error was recieved:

In file included from /usr/include/boost/config.hpp:35,
                 from /usr/include/boost/numeric/ublas/config.hpp:24,
                 from /usr/include/boost/numeric/ublas/matrix.hpp:20,
                 from a.C:1:
/usr/include/boost/config/compiler/gcc.hpp:92:7: warning: #warning 
"Unknown compiler version - please run the configure tests and report 
the results"
/usr/include/boost/mpl/aux_/integral_wrapper.hpp:72: error: template 
argument 2 is invalid
/usr/include/boost/mpl/aux_/integral_wrapper.hpp:73: error: template 
argument 2 is invalid


Please let me know if I should file a PR

thanks!
-BenRI