http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52887
--- Comment #8 from Daniel Richard G. <skunk at iskunk dot org> 2012-05-12 05:09:15 UTC --- (In reply to comment #7) > Looks as though it also needs > template class function<bool (__regex::_PatternCursor const&)>; I added that, and with the two instantiations, bootstrap completes successfully. (I don't suppose that's the fix, however, given that other systems don't need this...)