Thread: Weird access violation error with stack

In my game, I have this piece of code:

Code:

if (Game::EnemiesToSpawn.empty())
{
      Game::isSpawned = false;
      level.setCurrentLevel(level.getCurrentLevel() + 1);
}
else
{
      SpawnEnemy(Game::EnemiesToSpawn.top(), enemy_Knight);
      Game::EnemiesToSpawn.pop();
}

I used some ghetto-style debugging. This game library does not have a debug build, so I cannot step-through. What I did was have it write to a text file every couple lines to narrow it down (not shown obviously). It errors out right before the SpawnEnemy call.

It does not even get to the first line of the actually SpawnEnemy function. Enemy_Knight is simply an integer enumerator. EnemiesToSpawn is a stack of ints. There is nothing else it could be except for the stack.

What's weird is I will get an access violation error RANDOMLY. It's always on this line, but it occurs anywhere from 2-10 minutes of game play. I don't get why it does this - what exactly would cause an error like this? I would think it would maybe occur if the stack is empty when I tried to top() it, but the if statement is clear and straightforward - that can't be the case.

Help!