[Bug libstdc++/51365] cannot use final empty class in std::tuple

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51365

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-11-30 
21:07:00 UTC ---
Created attachment 25962
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25962
library patch (missing tests)