http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60448
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Marc Glisse from comment #6) > libc++ sfinae constrains std::swap. Aha! I suppose we could do that too, but that would be an enhancement (and have to wait until after the 4.9 release), but apart from that I think we agree now this is not a bug.
