Creating STL map<string, pair<string, string> >

Platform: Win95          Compiler: VC++ 4.2

I have a problem on creating the following map instance using the MS version of STL (internal error reported from the compiler):

typedef pair<string, string>  PairType;
typedef map<string, PairType, ::less<string>, allocator<PairType> >   MapType;

......

MapType     mymap;

To experiment, I changed the types in PairType to be pair<int, int>, it at least compiles okay. But if I switch one of the int back to string, the same symptom occurs.

The following lists my test source codes:


#pragma warning( disable : 4786)

#include <map>
#include <string>

typedef      pair<string, string>      PairType;
typedef      map<string, PairType, ::less<string>, allocator<PairType> >      MapType;


static void      do_test();

int
main()
{
      do_test();
      return 0;
}

static void
do_test()
{
      string      key1("key1"), key2("key999");
      string      data1("data1"), data2("data2"), data3("data3"), data4("data4");

      MapType      mymap;
      mymap[key1] = PairType(data1, data2);
}