C++ weird behavior with structs and vectors

Question

When I run the code:

#include <iostream>
#include <vector>

using namespace std;

struct A_s {
    int *arr;
    unsigned int l;

    A_s(unsigned int size) : l(size) {
        arr = new int[size];
        cout<<'\t'<<arr<<endl;
    }

    ~A_s() {
        delete[] arr;               // works if line is removed
    }
};

vector<A_s> vec;

int main() {
    cout<<"vec 0"<<endl;
    vec.emplace_back(1);

    cout<<"vec 1"<<endl;
    vec.emplace_back(1);

    cout<<"vec 2"<<endl;
    vec.emplace_back(1);

    for(unsigned int i = 0; i < vec.size(); i++) cout<<&vec[i]<<endl;

    cout<<"end"<<endl;
    return 0;
}

The output is:

vec 0
        0x761710
vec 1
        0x761a90
vec 2
        0x761ab0
mingw32-make: *** [Makefile:6: run] Error -1073740940

The program runs without errors if I delete the line delete[] arr. Is the destructor being called before the end of the program? And even if it does, why is it causing an error?