Executable compiled with MinGW outputs nothing when using vector

I'm new to using MinGW and C++ in general, and whenever try compile my source file, the executable seemingly does nothing, even though it should output a simple "Hello World!". I've tried commenting out the lines that use vector, and it'd output "Hello World!" just fine.

Source code which doesn't seem to do or output anything:

#include <iostream>
#include <vector>

typedef long long ll;

using namespace std;

const int LIMIT = 1000000; // one million

int main(int argc, char *argv[])
{
    int* arr = new int[LIMIT] {0};
    vector<int>* v = new vector<int>();
    cout << "Hello World!" << endl;
    delete v;
    return 0;
}

Source code with vector commented out that outputs "Hello World!" just fine:

#include <iostream>
#include <vector>

typedef long long ll;

using namespace std;

const int LIMIT = 1000000; // one million

int main(int argc, char *argv[])
{
    int* arr = new int[LIMIT] {0};
    // vector<int>* v = new vector<int>();
    cout << "Hello World!" << endl;
    // delete v;
    return 0;
}

Both are compiled and run with:

C:\Users\User\my\directory\src> g++ source.cpp -o source.exe -std=c++11
C:\Users\User\my\directory\src> ./source.exe

Compiling and running either doesn't produce any error message. Note that #include <vector> remains uncommented in both instances.