What does this C++ snippet output?

1#include <iostream>
2#include <vector>
3struct Noisy {
4  int id;
5  Noisy(int i) : id(i) { std::cout << "ctor " << id << "\n"; }
6  ~Noisy() { std::cout << "dtor " << id << "\n"; }
7};
8int main() {
9    std::vector<Noisy> v;
10    v.reserve(2);
11    v.emplace_back(1);
12    v.emplace_back(2);
13    v.pop_back();
14    std::cout << "popped\n";
15}