Program: 33098
Project: 33098
Buggy source:
@SubscribeEvent public void onPlayerTick(ClientTickEvent evt){
  if (evt.phase != Phase.START || getMinecraft().thePlayer == null) {
    return;
  }
  invalidateObjectMouseOver();
  resetAllInputs();
  AIStrategy newStrat;
  if (dead || stop.isPressed() || stop.getIsKeyPressed()) {
    dead=false;
    currentStrategy=null;
    tasks.clear();
    System.out.println("String_Node_Str");
    resetTimeout();
  }
 else   if ((newStrat=findNewStrategy()) != null) {
    tasks.clear();
    currentStrategy=newStrat;
    System.out.println("String_Node_Str" + newStrat);
    resetTimeout();
  }
 else   if (desync) {
    tasks.clear();
  }
  desync=false;
  if (currentStrategy != null) {
synchronized (strategyDescrMutex) {
      strategyDescr=currentStrategy.getDescription();
    }
    final AITask overrideTask=currentStrategy.getOverrideTask(this);
    if (overrideTask != null) {
      tasks.clear();
      tasks.push(overrideTask);
    }
 else     if (tasks.isEmpty()) {
      currentStrategy.searchTasks(this);
      resetTimeout();
      System.out.println("String_Node_Str" + tasks.peekFirst());
    }
    if (tasks.isEmpty()) {
      dead=true;
    }
 else {
      final AITask task=tasks.get(0);
      if (task.isFinished(this)) {
        tasks.remove(0);
        resetTimeout();
        System.out.println("String_Node_Str" + tasks.peekFirst());
        if (tasks.peekFirst() != null) {
          timeout=tasks.peekFirst().getGameTickTimeout();
        }
      }
 else       if (timeout <= 0) {
        desync=true;
      }
 else {
        timeout--;
        try {
          task.runTick(this);
        }
 catch (        final Throwable t) {
          t.printStackTrace();
          AIChatController.addChatLine("String_Node_Str" + t.getMessage() + "String_Node_Str");
        }
      }
    }
  }
 else {
synchronized (strategyDescrMutex) {
      strategyDescr="String_Node_Str";
    }
  }
}

Fixed version (ground truth):
/** 
 * Checks if the Bot is active and what it should do.
 * @param evt
 */
@SubscribeEvent public void onPlayerTick(ClientTickEvent evt){
  if (evt.phase != Phase.START || getMinecraft().thePlayer == null) {
    return;
  }
  invalidateObjectMouseOver();
  resetAllInputs();
  AIStrategy newStrat;
  if (dead || stop.isPressed() || stop.getIsKeyPressed()) {
    dead=false;
    currentStrategy=null;
    tasks.clear();
    System.out.println("String_Node_Str");
    resetTimeout();
  }
 else   if ((newStrat=findNewStrategy()) != null) {
    tasks.clear();
    currentStrategy=newStrat;
    System.out.println("String_Node_Str" + newStrat);
    resetTimeout();
  }
 else   if (desync) {
    tasks.clear();
  }
  desync=false;
  if (currentStrategy != null) {
synchronized (strategyDescrMutex) {
      strategyDescr=currentStrategy.getDescription();
    }
    final AITask overrideTask=currentStrategy.getOverrideTask(this);
    if (overrideTask != null) {
      tasks.clear();
      tasks.push(overrideTask);
    }
 else     if (tasks.isEmpty()) {
      currentStrategy.searchTasks(this);
      resetTimeout();
      System.out.println("String_Node_Str" + tasks.peekFirst());
    }
    if (tasks.isEmpty()) {
      dead=true;
    }
 else {
      final AITask task=tasks.get(0);
      if (task.isFinished(this)) {
        tasks.remove(0);
        resetTimeout();
        System.out.println("String_Node_Str" + tasks.peekFirst());
        if (tasks.peekFirst() != null) {
          timeout=tasks.peekFirst().getGameTickTimeout();
        }
      }
 else       if (timeout <= 0) {
        desync=true;
      }
 else {
        timeout--;
        try {
          task.runTick(this);
        }
 catch (        final Throwable t) {
          t.printStackTrace();
          AIChatController.addChatLine("String_Node_Str" + t.getMessage() + "String_Node_Str");
        }
      }
    }
  }
 else {
synchronized (strategyDescrMutex) {
      strategyDescr="String_Node_Str";
    }
  }
}