Hi, I have encountered a crash trying to use the target() function to retrieve a function pointer from a boost.function initialized with a member function (using boost.bind). See the code below. // =========================================== #include <iostream> #include <boost/bind.hpp> #include <boost/function.hpp> typedef double(*FunctionType) (double); double Square( FunctionType f, double x ) { return f(x) * f(x) ; } class A { private: double x_; double y_; public: A() : x_(1.0), y_(1.0) {} double Area(double x, double y) { x_ = x; y_ = y; return x_ * y_; } }; int main() { A a1; boost::function<double(double)> f1 = boost::bind( boost::mem_fn(&A::Area), &a1, _1, 2.5 ); double s1 = f1(2.0); // this works FunctionType f2 = *f1.target<FunctionType>() ; // Error: this would crash s1 = Square( f2, 2.0 ); return 0; } // ====================================================== After debugging the code, I found out that the crashed happened inside target() function in file function_base.hpp: template<typename Functor> Functor* target() { if (!vtable) return 0; detail::function::function_buffer type_result; type_result.const_obj_ptr = &typeid(Functor); vtable->manager(functor, type_result, detail::function::check_functor_type_tag); return static_cast<Functor*>(type_result.obj_ptr); } After vtable->manager() call, type_result became null, and this caused static_cast to fail. I was using boost_1_36_0 precompiled by BoostPro with Visual Studio 2008. Is this an expected behavior? Your feedback would be greatly appreciated. Pengcheng Song -- View this message in context: http://www.nabble.com/-Function--Problem-using-target%28%29-with-boost%3A%3A... Sent from the Boost - Dev mailing list archive at Nabble.com.