bug in apple clang

apple_clang_bug.cpp

#include <algorithm>
#include <memory>
#include <vector>

// Example allocator, doesn't do anything but implements std::allocator_traits
template<typename T>
struct null_allocator {
  using value_type = T;
  using size_type = std::size_t;
  using pointer = T *;
  using const_pointer = const pointer;
  //using difference_type = typename std::pointer_traits<pointer>::difference_type;
  using reference = T &;
  using const_reference = const T &;

  null_allocator() {}

  template<typename U>
  null_allocator(const null_allocator<U>&) {}

  T* allocate(std::size_t size) {
    (void) size;
    return nullptr;
  }

  void deallocate(T* ptr, std::size_t size) {
    (void) ptr;
    (void) size;
  }

  template<typename U>
  struct rebind
  {
    typedef null_allocator<U> other;
  };
};

int main(int argc, char** argv) {
  std::vector<void*, null_allocator<void*>> vec;

  void * args;
  vec.push_back(args);
  vec.erase(vec.begin());
}