namev_to_backref_number 1931 re.c           	    int num = namev_to_backref_number(RMATCH_REGS(match), RMATCH(match)->regexp, idx);
namev_to_backref_number 1992 re.c           	    int num = namev_to_backref_number(RMATCH_REGS(match), RMATCH(match)->regexp, argv[i]);