http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59177
--- Comment #9 from Andy Lutomirski <luto at mit dot edu> --- Given that this is C++11-only, it's already fixed on trunk, it's only a performance issue (as opposed to correctness), and it's more complicated than just changing the default, I won't argue for a backport. >From my perspective, feel free to close this.