Boost C++ Libraries: Ticket #12275: bind fwds shared_ptr twice, invokes memfn with nullptr

Fri, 17 Jun 2016 17:00:37 GMT

Let's try that code sample again. :^{) Slightly adjusted for clarity.}

#include <stdio.h>
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>
using namespace boost;
struct Obj { bool MF() const { printf("this %p\n", this); return true; } };
using tFunc = function<bool(shared_ptr<const Obj>)>;
int main() {
  shared_ptr<const Obj> sptr = make_shared<Obj>();
  tFunc AA, BB;
  AA = bind(&Obj::MF, _1);
  BB = bind(AA, _1) && bind(&Obj::MF, _1);
  BB(sptr);

Fri, 17 Jun 2016 17:02:39 GMT

Peter Dimov — Mon, 20 Jun 2016 17:49:52 GMT

Thanks for the report; should be fixed in https://github.com/boostorg/bind/commit/6616add21dff43f573d51503ebad4d3fcbcb2619

Mon, 20 Jun 2016 19:55:57 GMT

Wow quick turn-around! Confirmed fix works for both the sample and the actual application. Thanks!

status changed; resolution set

Peter Dimov — Fri, 22 Jul 2016 17:27:27 GMT

status new → closed
resolution → fixed

Merged to master.