EZBounce Error

dovahkin@skylake:~/Bouncer$ make
  [g++]    src/authorizer.cc
src/authorizer.cc: In member function ‘int authorizer::login_connection(conn*, const char*, const char*)’:
src/authorizer.cc:157:21: error: call of overloaded ‘copy_if(std::vector<ruleset*>::iterator, std::vector<ruleset*>::iterator, std::back_insert_iterator<std::vector<ruleset*> >, match_helper)’ is ambiguous
   match_helper(this));
                     ^
In file included from src/authorizer.cc:15:0:
include/util/generic.h:84:6: note: candidate: Out util::copy_if(In, In, Out, Pred) [with In = __gnu_cxx::__normal_iterator<ruleset**, std::vector<ruleset*> >; Out = std::back_insert_iterator<std::vector<ruleset*> >; Pred = match_helper]
  Out copy_if(In first, In last, Out res, Pred p)
      ^~~~~~~
In file included from /usr/include/c++/6/algorithm:62:0,
                 from src/authorizer.cc:14:
/usr/include/c++/6/bits/stl_algo.h:734:5: note: candidate: _OIter std::copy_if(_IIter, _IIter, _OIter, _Predicate) [with _IIter = __gnu_cxx::__normal_iterator<ruleset**, std::vector<ruleset*> >; _OIter = std::back_insert_iterator<std::vector<ruleset*> >; _Predicate = match_helper]
     copy_if(_InputIterator __first, _InputIterator __last,
     ^~~~~~~
Makefile:173: recipe for target 'src/authorizer.o' failed
make: *** [src/authorizer.o] Error 1
dovahkin@skylake:~/Bouncer$