View Compilation Error

0_0_38256149_8436.cpp: In instantiation of 'Cap atcoder::mf_graph<Cap>::flow(int, int, Cap) [with Cap = int]':
0_0_38256149_8436.cpp:77:52:   required from 'Cap atcoder::mf_graph<Cap>::flow(int, int) [with Cap = int]'
0_0_38256149_8436.cpp:187:30:   required from here
0_0_38256149_8436.cpp:127:42: error: invalid use of 'auto'
     Cap f = dfs(dfs, t, flow_limit - flow);
                                          ^