[C++-sig] strange sideeffect or bug of boost.python

[Lutz Paelike]

Hi,

i encountered a strange thing when i wanted to create a dictionary object from c++.
The error is after creating the dict with no errors (result!=NULL) a simple PyDict_Check fails with no reason.
I tracked this down through the Python Sources and extracted the essential source of PyDict_Check and inserted
it into the example code below. In the Debugger i see that the ob_type of the new object is somehow screwed up.
And now the strange thing: This error goes away and the code works like expected if i remove the boost include.

Am I missing something or is this a strange side effect ?

I'm using Visual Studio 6 SP5 and a recent boost cvs checkout (about 1-2 weeks old)

Thanks for your help,

Lutz

Here is the code:

///////////////////////////snip//////////////////////////////////////
#include <boost/python.hpp> // comment this out to make it work

#include <string>
#include <iostream>
#include <fstream>
#include <exception>
#include <stdexcept>

#include <Python.h>
#include <compile.h>
#include <eval.h>
#include <dictobject.h>


int main()
{
     Py_Initialize();

	PyObject *the_dict = PyDict_New ();

	if (NULL!=the_dict){

		Py_INCREF(the_dict);

		_typeobject  * dt = &PyDict_Type;

		// PyDict_Check does this. Why isn't this working here?
		bool isT  = ((the_dict)->ob_type == (&PyDict_Type));
		bool isST = PyType_IsSubtype((the_dict)->ob_type, (&PyDict_Type));

		if (isT) printf("the_dict is of type PyDict_Type\n");
		else printf("the_dict is not of type PyDict_Type! Boost.Python Bug?\n");
		
		if (isST) printf("the_dict is of subtype PyDict_Type\n");
		else printf("the_dict is not of subtype PyDict_Type! Boost.Python Bug?\n");

		Py_DECREF(the_dict);

	} else printf("Error creating new dict\n");

	Py_Finalize();

     return 0;
}

///////////////////////////snip//////////////////////////////////////