Test: iterator_invalidation.cpp
iterator_invalidation.cpp:31:10: error: 'list' in namespace 'std' does not name a template type
   31 |     std::list<std::string> events_;
      |          ^~~~
iterator_invalidation.cpp:3:1: note: 'std::list' is defined in header '<list>'; did you forget to '#include <list>'?
    2 | #include <vector>
  +++ |+#include <list>
    3 | #include <string>
iterator_invalidation.cpp: In member function 'void EventQueue::addEvent(const std::string&)':
iterator_invalidation.cpp:9:9: error: 'events_' was not declared in this scope; did you mean 'event'?
    9 |         events_.push_back(event);
      |         ^~~~~~~
      |         event
iterator_invalidation.cpp: In member function 'void EventQueue::processEvents()':
iterator_invalidation.cpp:16:24: error: 'events_' was not declared in this scope
   16 |         for (auto it = events_.begin(); it != events_.end(); ++it) {
      |                        ^~~~~~~
iterator_invalidation.cpp: In member function 'int EventQueue::getEventCount() const':
iterator_invalidation.cpp:27:16: error: 'events_' was not declared in this scope
   27 |         return events_.size();
      |                ^~~~~~~