70     bool is_failed = false;  in main()  local
80         is_failed = is_failed || (!check_edge(g, a, b));  in main()
83     if (is_failed)  in main()
98         is_failed = is_failed || check_edge(g, a, b);  in main()
100     if (is_failed)  in main()
108     is_failed = false;  in main()
119     is_failed = false;  in main()
131         is_failed = is_failed || !check_edge(g, vid, a);  in main()
132         is_failed = is_failed || !check_edge(g, b, vidp1);  in main()
134     if (is_failed)  in main()
142     is_failed = false;  in main()
146         is_failed = true;  in main()
155         is_failed = true;  in main()
157     if (is_failed)  in main()