http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58166
--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- (In reply to Jay Foad from comment #3) > I've bisected this to r191805: > > http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=191805 > http://gcc.gnu.org/ml/gcc-patches/2012-09/msg01764.html I suspect that is just exposing a latent problem.