RaiiProblems.cpp

// Problem #1
{
  int *arr = new int[dynamicSize];
} // arr goes out of scope but we didn't delete it, we have a memory leak

// Problem #2
std::mutex globalMutex;
void funcCalledInMultipleThreads() {
  globalMutex.lock();
  // Code that runs in multiple threads...
} // We never unlocked the mutex, so this function will deadlock

// Problem #3
{
  std::thread t1([]() {
    std::cout << "In a thread" << std::endl;
    // Do some stuff...
    return 5;
  });
} // Thread goes out of scope and is joinable, std::terminate is called