destruction of std::map, heap corruption

{ Note that questions are better answered when posted with a minimal,
   compilable standard C++ code by relevant definitions supplied and
   irrelevant dependency upon proprietary features removed.

   Responders are encouraged to stay within the standard C++. -mod }

Hello,
msvc2005 (main.cpp and another .cpp in a DLL)
I have 2 situations:

1)
* const black_scholes_merton<european_put>& bsmep =
black_scholes_merton<european_put>::getModel();
* pricing_model::result_set* rs = new pricing_model::result_set;
* bsmep.allOrSome(*rs, pricing_model::operation_set(pricing_model::PRICE),
epx, pmp);
* double pr = (*rs)[pricing_model::PRICE];
* delete rs;

bsmep.allOrSome is a one liner public nonvirtual member function of
black_scholes_merton<european_put>
allOrSome(result_set& res, const operation_set opset, const contract& c,
const pricing_model_parameters& mparams) const
{
res[PRICE] = 77.0;
}

class pricing_model::result_set {
public:
double& operator[](Operation);
private:
std::map<pricing_model::Operation,double> map_;
};
inline double& pricing_model::result_set::operator[](Operation op)
{
return map_[op];
}
This causes heap corruption. In debug, steeping over "delete rs", you can
see the callstack below:

2)
* const black_scholes_merton<european_put>& bsmep =
black_scholes_merton<european_put>::getModel();
* pricing_model::result_set* rs = new pricing_model::result_set;
* (*rs)[PRICE] = 77.0;
* double pr = (*rs)[pricing_model::PRICE];
* delete rs;

works fine. I just replaced the call to allOrSome by its one line.

Note, allOrSome is defined in another translation unit, in a DLL. The class
containing the method is exported.

I didn't define constructors/destructors for result_set because I think the
default ones generated by the compiler should be ok?

Any help is appreciated,

Regards,

PS: I link my main.exe and my dll against MS multithreaded runtime static
lib (not dll)
---------------------------------------------------------------------------------------------------------------------
   ntdll.dll!0000000077ef2aa0()
      [Frames below may be incorrect and/or missing, no symbols loaded for
ntdll.dll]
   ntdll.dll!0000000077f623b1()
   ntdll.dll!0000000077f11fbf()
   kernel32.dll!0000000077d8fbaa()


   main.exe!_free_dbg_nolock(void * pUserData=0x0000000000576b30, int
nBlockUse=1) Line 1279 + 0xa bytes C++
   main.exe!_free_dbg(void * pUserData=0x0000000000576b30, int nBlockUse=1)
Line 1220 + 0xe bytes C++
   main.exe!operator delete(void * pUserData=0x0000000000576b30) Line 54 +
0x12 bytes C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false>
  >::_Node>::deallocate(std::_Tree_nod<std::_Tmap_traits<blitzq::pricing_model::Operation,
double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::_Node * _Ptr=0x0000000000576b30,
std::allocator<std::_Tree_nod<std::_Tmap_traits<blitzq::pricing_model::Operation,
double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::_Node> * this=0x0000000000584000) Line 142 C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false>
  >::_Erase(std::_Tree_nod<std::_Tmap_traits<blitzq::pricing_model::Operation,
double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::_Node * _Rootnode=0x0000000000576b30) Line 1073 C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::clear() Line 955 C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false>
  >::erase(std::_Tree<std::_Tmap_traits<blitzq::pricing_model::Operation,
double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::iterator & _First=(PRICE,77.000000000000000),
std::_Tree<std::_Tmap_traits<blitzq::pricing_model::Operation, double,
std::less<blitzq::pricing_model::Operation>, std::allocator<std::pair<const
blitzq::pricing_model::Operation, double> >, false> >::iterator &
_Last=(-842150451,-6.2774385622041925e+066),
std::_Tree<std::_Tmap_traits<blitzq::pricing_model::Operation, double,
std::less<blitzq::pricing_model::Operation>, std::allocator<std::pair<const
blitzq::pricing_model::Operation, double> >, false> > *
this=0x0000000000583ff0) Line 921 C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::_Tidy() Line 1327 + 0x4f bytes C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >,
false> >::~_Tree() Line 526 + 0xc bytes C++
   main.exe!Operation, double, std::less<blitzq::pricing_model::Operation>,
std::allocator<std::pair<const blitzq::pricing_model::Operation, double> >
  >::~map() + 0x22 bytes C++
   main.exe!pricing_model::result_set::~result_set() + 0x22 bytes C++
   main.exe!blitzq::pricing_model::result_set::`vector deleting destructor'()
+ 0x1e bytes C++
   main.exe!main(int argc=7, char * * argv=0x0000000000584ae0) Line 60 C++

--
      [ See http://www.gotw.ca/resources/clcm.htm for info about ]
      [ comp.lang.c++.moderated. First time posters: Do this! ]