http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55041
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-10-23 20:54:38 UTC --- (on my phone so can't check...) If the failures are in unordered_set it's almost certainly http://gcc.gnu.org/ml/libstdc++/2012-10/msg00147.html and the printers need to go via _M_h
