Program terminated with signal 11, Segmentation fault.
#0  std::_Rb_tree<unsigned int, std::pair<unsigned int const, Player*>, std::_Select1st<std::pair<unsigned int const, Player*> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, Player*> > >::find (this=0x38,
    __k=@0x7f61cf5d9b0c) at /usr/include/c++/4.4/bits/stl_tree.h:1421
1421          iterator __j = _M_lower_bound(_M_begin(), _M_end(), __k);