Hello CF I write this blog because I encountered a rather weird issue, maybe anyone here has the same issue or even has solved this? I was participating in a contest earlier when I tried to compile & run for problem B and my code doesn't run.

Here's the thing:

This compiles and run, I can see Hello printed in my terminal

#include <bits/stdc++.h>
using namespace std;

int main() {
  vector<int> v;
  cout << "Hello";
  // v.push_back(2);
  return 0;
}

However when I uncomment v.push_back(2) my code compiles but doesn't run! (I don't see Hello in terminal)

Commands I used: g++ main.cpp -Wall -o main .\main.exe

There's no warning or error message.

I have tried compiling with MSYS64 (my main) and MSVC x64, same results.

Yesterday it was working fine, so maybe something breaks my c++ runtime. Here's a list of what I did today before running to this problem (while in a contest ╯︿╰ ): - installed Anaconda - installed git, - installed Visual Studio and C/C++ build toolchain (for rust), - installed rust

Similar problem: https://stackoverflow.com/questions/70809283/c-program-does-not-run-if-a-vector-has-any-contents

However I don't have enough karma there, I'd love to participate in that post's comment section.

Then I tried Visual Studio IDE and it works! Sadly VS complains when I do int arr[n]; saying array size should be static.

I'm considering IDEs since text editor has this issue (I implied IDE is OK because Visual Studio is OK), maybe I'll go with DevC++.