alt_merge_opt_exact_info 4917 regcomp.c        alt_merge_opt_exact_info(&to->exb,  &add->exb, env);
alt_merge_opt_exact_info 4918 regcomp.c        alt_merge_opt_exact_info(&to->exm,  &add->exm, env);
alt_merge_opt_exact_info 4919 regcomp.c        alt_merge_opt_exact_info(&to->expr, &add->expr, env);