concat_opt_exact_info 4492 regcomp.c            concat_opt_exact_info(&to->exb, &add->exb, enc);
concat_opt_exact_info 4496 regcomp.c            concat_opt_exact_info(&to->exm, &add->exb, enc);
concat_opt_exact_info 4797 regcomp.c      		concat_opt_exact_info(&opt->exb, &nopt.exb, env->enc);