http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041
--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 13:47:06 UTC --- I just bootstrapped r183695 (incl. Ada and Obj-C++) with --enable-checking=release on i686-darwin9, using gcc4.6 as the bootstrap compiler. What bootstrap compiler where you using?