[Bug c++/17570] Extension to incorporate default parameters in signature of templates breaks valid program

[bangerth at dealii dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |2.95.3 3.2.3 3.3.4 3.4.2
                   |                            |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17570