I think C++ should be "If you're not running at compile-time, you're not living In file included from /usr/include/c++/4.6/algorithm:63:0, from errorcode.cpp:2: /usr/include/c++/4.6/bits/stl_algo.h: In function ‘_RandomAccessIterator std::find(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::normal_iterator*, std::vector > >, _Tp = int]’: /usr/include/c++/4.6/bits/stl_algo.h:4403:45: instantiated from ‘_IIter std::find(_IIter, _IIter, const _Tp&) [with _IIter = __gnu_cxx::normal_iterator*, std::vector > >, _Tp = int]’ error_code.cpp:8:89: instantiated from here /usr/include/c++/4.6/bits/stl_algo.h:162:4: error: no match for ‘operator==’ in ‘first.gnu_cxx::_normal_iterator::operator* [with Iterator = std::vector*, _Container = std::vector >, __gnu_cxx::_normal_iterator::reference = std::vector&]() == __val’ /usr/include/c++/4.6/bits/stl_algo.h:162:4: note: candidates are: /usr/include/c++/4.6/bits/stl_pair.h:201:5: note: template bool std::operator==(const std::pair&, const std::pair&) /usr/include/c++/4.6/bits/stl_iterator.h:285:5: note: template bool std::operator==(const std::reverse_iterator&, const std::reverse_iterator&) /usr/include/c++/4.6/bits/stl_iterator.h:335:5: note: template bool std::operator==(const std::reverse_iterator&, const std::reverse_iterator&) /usr/include/c++/4.6/bits/allocator.h:122:5: note: template bool std::operator==(const std::allocator&, const std::allocator&) /usr/include/c++/4.6/bits/allocator.h:127:5: note: template bool std::operator==(const std::allocator&, const std::allocator&) /usr/include/c++/4.6/bits/stl_vector.h:1273:5: note: template bool std::operator==(const std::vector&, const std::vector&) ...