numbered_ref_check 1994 regcomp.c            r = numbered_ref_check(NCAR(node));
numbered_ref_check 1998 regcomp.c          r = numbered_ref_check(NQTFR(node)->target);
numbered_ref_check 2001 regcomp.c          r = numbered_ref_check(NENCLOSE(node)->target);
numbered_ref_check 5755 regcomp.c            r = numbered_ref_check(root);