re_error
regerror(c, &r_pattern[i], re_error,
errx(2, "%s", re_error);
char re_error[RE_ERROR_BUF + 1];
extern char re_error[RE_ERROR_BUF + 1]; /* Seems big enough */
re_error(sp, eval, &sp->re_c);
re_error(sp, eval, &sp->re_c);
re_error(sp, eval, &sp->re_c);
re_error(sp, eval, &sp->re_c);
re_error(sp, eval, re);
re_error(sp, rval, rep);
void re_error(SCR *, int, regex_t *);