I have added a new bug to connect.microsoft.com. I can send the sample project if anybody needs it. https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?Feedba... Type Bug ID 420897 Status Active Access Restriction Public Opened By OlegGL Blocking Issue No Opened 3/5/2009 Submission Language English ------------------------------------------------------------------------ *Description * The problem looks identical to one described in bug #101889. http://connect.microsoft.com/VisualStudio/feedback/Workaround.aspx?FeedbackI... There is only one difference - intrusive_ptr instead of shared_ptr originally reported in #101889 The code bellow causes assertion: boost::intrusive_ptr<test_ptr> ptr; if(ptr) assert(false); //MUST NOT HAPPEN BUT IT DOES! Reproduced on VS2005 SP1 and VS2008 SP1 (Windows XP SP2) Boost 1.38 To reproduce the problem, the Boost (booost/smart_ptr.hpp in our case) shall be included in the CLI-compiled file under #pragma managed (push,off) (see the code below) If changed to "#pragma managed (push,on)", then everything is fine Product Language English Version Visual Studio 2008 SP1 Operating System Windows XP Professional Operating System Language English *How to reproduce: *Create any native win32 C++ project, for example a console based. int _tmain(int argc, _TCHAR* argv[]) { do_test(); return 0; } 1) Install and compile BOOST 1.38 2) Add a new CPP file to the project. This file has a minimal intrusive pointer "environment" and a code check. The Code is below. 3) Set /clr option for that particular file (Common Language Runtime Support in the Options) 4) build the project #include "stdafx.h" #include "test3_dll.h" #pragma managed (push,off) #include "boost/smart_ptr.hpp" class intrusive_ptr_base1 { friend void intrusive_ptr_add_ref(intrusive_ptr_base1*); friend void intrusive_ptr_release(intrusive_ptr_base1*); size_t m_ref_counter; void add_ref() { ++m_ref_counter; } void release() { if (--m_ref_counter == 0) delete this; } protected: intrusive_ptr_base1() : m_ref_counter(0) {} virtual ~intrusive_ptr_base1() {} intrusive_ptr_base1(intrusive_ptr_base1 const &) :m_ref_counter(0) {} intrusive_ptr_base1 &operator=(intrusive_ptr_base1 const &) { return *this; } }; inline void intrusive_ptr_add_ref(intrusive_ptr_base1* e) { e->add_ref(); } inline void intrusive_ptr_release(intrusive_ptr_base1* e) { e->release(); } class test_ptr : public intrusive_ptr_base1 { }; #pragma managed (pop) void do_test() { boost::intrusive_ptr<test_ptr> ptr; if(ptr) assert(false); } Actual Results if(ptr) returns true for the empty ptr! Expected Results if(ptr) must return false for the empty ptr TAP Code (if applicable)