copy_opt_anc_info 4228 regcomp.c        copy_opt_anc_info(&to->anc, &tanc);
copy_opt_anc_info 4471 regcomp.c        copy_opt_anc_info(&to->anc, &tanc);
copy_opt_anc_info 4476 regcomp.c          copy_opt_anc_info(&add->exb.anc, &tanc);