http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53646
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-12 14:19:33 UTC --- N.B. std::pair is not a POD in c++98 or c++11, so I don't know what libstdc++ could have done to cause the FE to change how it returns a std::pair.
