Compiling the following test case
#define _GLIBCXX_DEBUG

#include <map>

int
main( int argc, char * argv[ ] ) {
  std::map< int, float > m1, m2;

  m1[ 3 ] = 3.0f;
  m1[ 11 ] = -67.0f;

  m2.insert( m1.begin( ), m1.end( ) );

  return 0;
}

Gives this error:
[tmp]$ /work/root.fsf/bin/g++ -c foo.cc
/Volumes/Data/work/root.fsf/bin/../lib/gcc/powerpc-apple-darwin7.4.0/3.5.0/../../../../include/
c++/3.5.0/debug/map.h: In member function `void __gnu_debug_def::map<_Key, _Tp, _Compare, 
_Allocator>::insert(_InputIterator, _InputIterator) [with _InputIterator = __gnu_debug::
_Safe_iterator<std::_Rb_tree_iterator<std::pair<const int, float> >, __gnu_debug_def::map<int, float, 
std::less<int>, std::allocator<std::pair<const int, float> > > >, _Key = int, _Tp = float, _Compare = 
std::less<int>, _Allocator = std::allocator<std::pair<const int, float> >]':
foo.cc:12:   instantiated from here
/Volumes/Data/work/root.fsf/bin/../lib/gcc/powerpc-apple-darwin7.4.0/3.5.0/../../../../include/
c++/3.5.0/debug/map.h:166: error: `__glibcxx_valid_range' was not declared in this scope