numbered_ref_check 1871 regcomp.c            r = numbered_ref_check(NCAR(node));
numbered_ref_check 1875 regcomp.c          r = numbered_ref_check(NQTFR(node)->target);
numbered_ref_check 1878 regcomp.c          r = numbered_ref_check(NENCLOSE(node)->target);
numbered_ref_check 5386 regcomp.c            r = numbered_ref_check(root);