What in the world was causing that crash?! I finally figured it out...

lambda-self-destruct-demo.cpp

// build with `cl /nologo /W3 /WX /EHsc /MT /O2 /Z7 /Zo main.cpp`

#include <functional>

static const size_t QUANTITY = 2555;

struct Obj
{
  std::function<void ()> func;
};

static void do_something(Obj *obj, int var)
{
  delete obj;
  printf("got %d\n", var);
}

int main()
{
  Obj *objs[QUANTITY];

  for(int i = 0; i < QUANTITY; ++i) {
    int var = 42;
    Obj *obj = objs[i] = new Obj;

    // CRASH – `var` is copied into the std::function and thus will be freed before use
    obj->func = [=] { delete obj; printf("got %d\n", var); };

    // OK – `var` is still copied into the std::function, however it is
    // re-copied into the function's stack before being deleted
    obj->func = std::bind(&do_something, obj, var);
  }

  // now that the original `var` is out of scope:
  for(int i = 0; i < QUANTITY; ++i)
    objs[i]->func();
}