std::map<int, float>::iterator "not accessible"

1. Let the debugger stop at a breakpoint behind this code:

           typedef std::map<int, float> Map;
           Map map;
           map[11] = 11.0;
           map[22] = 22.0;
           map[33] = 33.0;
           map[44] = 44.0;
           map[55] = 55.0;
           map[66] = 66.0;
   
           Map::iterator it1 = map.begin();
           Map::iterator it2 = it1; ++it2;
           Map::iterator it3 = it2; ++it3;
           Map::iterator it4 = it3; ++it4;
           Map::iterator it5 = it4; ++it5;
           Map::iterator it6 = it5; ++it6;
   

   (taken from void testStdMapUIntFloatIterator() in simple.pro)

2. Check the iterators in Locals and Expressions view.
   They only display an address. When you expand them, this turns to "not accessible" and a member "[0]" without a value appears.

Instead, the map items the iterators point to should be displayed.