Library bug - Problem with string(string::reverse_iterator, string::reverse_iterator)

[Ryszard Kabatek <Ryszard dot Kabatek at softax dot pl>]

The attached sample does not compile with gcc-3.1 (linux), see the error messages below.

The reason is the following check at line 143 in basic_string.tcc:

    // NB: Not required, but considered best practice.
    if (__builtin_expect(__beg == _InIter(0), 0))
      __throw_logic_error("attempt to create string with null pointer");

The compiler is loocking for the constructor that takes an integer value 
and of course it cannot find it.

Regards
-- 
Ryszard Kabatek


g++ -Wall x.cc
x.cc: In function `int main()':
x.cc:5: `string' undeclared (first use this function)
x.cc:5: (Each undeclared identifier is reported only once for each function it
   appears in.)
x.cc:5: parse error before `::' token
rysio@rumcajs:~/tmp/xxx >vi x.cc
rysio@rumcajs:~/tmp/xxx >g++ -Wall x.cc
/home/rysio/gcc-3.1/include/g++-v3/bits/basic_string.tcc: In static member
   function `static _CharT* std::basic_string<_CharT, _Traits,
   _Alloc>::_S_construct(_InIter, _InIter, const _Alloc&,
   std::forward_iterator_tag) [with _FwdIter =
   std::reverse_iterator<__gnu_cxx::__normal_iterator<char*,
   std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >,
   _CharT = char, _Traits = std::char_traits<char>, _Alloc =
   std::allocator<char>]':
/home/rysio/gcc-3.1/include/g++-v3/bits/basic_string.h:707:   instantiated from
`static _CharT* std::basic_string<_CharT, _Traits, _Alloc>::_S_construct_aux(_In
Iter, _InIter, const _Alloc&, __false_type) [with _InIter = std::reverse_iterato
r<__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<c
har>, std::allocator<char> > > >, _CharT = char, _Traits = std::char_traits<char
>, _Alloc = std::allocator<char>]'
/home/rysio/gcc-3.1/include/g++-v3/bits/basic_string.h:724:   instantiated from
`static _CharT* std::basic_string<_CharT, _Traits, _Alloc>::_S_construct(_InIter
, _InIter, const _Alloc&) [with _InIter = std::reverse_iterator<__gnu_cxx::__nor
mal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocat
or<char> > > >, _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::a
llocator<char>]'
/home/rysio/gcc-3.1/include/g++-v3/bits/basic_string.tcc:241:   instantiated fro
m `std::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIter, _InputIt
er, const _Alloc&) [with _InputIterator = std::reverse_iterator<__gnu_cxx::__nor
mal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocat
or<char> > > >, _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::a
llocator<char>]'
x.cc:8:   instantiated from here
/home/rysio/gcc-3.1/include/g++-v3/bits/basic_string.tcc:143: no matching
   function for call to `
   std::reverse_iterator<__gnu_cxx::__normal_iterator<char*,
   std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::
   reverse_iterator(int)'
/home/rysio/gcc-3.1/include/g++-v3/bits/stl_iterator.h:123: candidates are:
   std::reverse_iterator<_Iterator>::reverse_iterator(const
   std::reverse_iterator<_Iterator>&) [with _Iterator =
   __gnu_cxx::__normal_iterator<char*, std::basic_string<char,
   std::char_traits<char>, std::allocator<char> > >]
/home/rysio/gcc-3.1/include/g++-v3/bits/stl_iterator.h:117:
   std::reverse_iterator<_Iterator>::reverse_iterator(_Iterator) [with
   _Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char,
   std::char_traits<char>, std::allocator<char> > >]
/home/rysio/gcc-3.1/include/g++-v3/bits/stl_iterator.h:111:
   std::reverse_iterator<_Iterator>::reverse_iterator() [with _Iterator =
   __gnu_cxx::__normal_iterator<char*, std::basic_string<char,
   std::char_traits<char>, std::allocator<char> > >]
#include <string>

int main()
{
  using std::string;
  string::reverse_iterator i1;
  string::reverse_iterator i2;
  string s(i1, i2);
}