very_old_normal_bl  129 gc/blacklst.c      word * very_old_normal_bl = GC_old_normal_bl;
very_old_normal_bl  135 gc/blacklst.c        GC_clear_bl(very_old_normal_bl);
very_old_normal_bl  138 gc/blacklst.c      GC_incomplete_normal_bl = very_old_normal_bl;