Test: iterator_invalidation.cpp
iterator_invalidation.cpp: In member function 'void EventQueue::processEvents()':
iterator_invalidation.cpp:18:40: error: 'it' was not declared in this scope; did you mean 'int'?
   18 |             std::cout << "Event: " << *it << std::endl;
      |                                        ^~
      |                                        int