NND,这都能错....

C/C++ code

#include <ext/hash_map>
#include <string>
int main()
{
    __gnu_cxx::hash_map< std::string, int > testMap;
    std::string str = " 狗日的,这都能错 ";
    std::string & rStr = str;

    __gnu_cxx::hash_map< std::string, int >::iterator it = testMap.find(str);
    /*或者:
    __gnu_cxx::hash_map< std::string, int >::iterator it = testMap.find(rStr);
    */
    return 0;
}

CentOS5.2 g++

/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/ext/hashtable.h: In member function ‘size_t __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::_M_bkt_num_key(const _Key&, size_t) const [with _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int>, _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _HashFcn = __gnu_cxx::hash<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _ExtractKey = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int> >, _EqualKey = std::equal_to<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<int>]’:
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/ext/hashtable.h:588: instantiated from ‘size_t __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::_M_bkt_num_key(const _Key&) const [with _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int>, _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _HashFcn = __gnu_cxx::hash<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _ExtractKey = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int> >, _EqualKey = std::equal_to<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<int>]’
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/ext/hashtable.h:511: instantiated from ‘__gnu_cxx::_Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc> __gnu_cxx::hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>::find(const _Key&) [with _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int>, _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _HashFcn = __gnu_cxx::hash<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _ExtractKey = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int> >, _EqualKey = std::equal_to<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<int>]’
/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/ext/hash_map:225: instantiated from ‘typename __gnu_cxx::hashtable<std::pair<const _Key, _Tp>, _Key, _HashFcn, std::_Select1st<std::pair<const _Key, _Tp> >, _EqualKey, _Alloc>::iterator __gnu_cxx::hash_map<_Key, _Tp, _HashFcn, _EqualKey, _Alloc>::find(const typename __gnu_cxx::hashtable<std::pair<const _Key, _Tp>, _Key, _HashFcn, std::_Select1st<std::pair<const _Key, _Tp> >, _EqualKey, _Alloc>::key_type&) [with _Key = std::basic_string<char, std::char