alt_merge_opt_anc_info 4280 regcomp.c        alt_merge_opt_anc_info(&to->anc, &add->anc);
alt_merge_opt_anc_info 4436 regcomp.c        alt_merge_opt_anc_info(&to->anc, &add->anc);
alt_merge_opt_anc_info 4526 regcomp.c        alt_merge_opt_anc_info  (&to->anc,  &add->anc);