In my developing game, sometime it show this error:

" Exception in thread "LWJGL Application" java.lang.IndexOutOfBoundsException: index can't be >= size: 1 >= 1
at com.badlogic.gdx.utils.Array.get(Array.java:127)
at com.esotericsoftware.spine.AnimationState.apply(AnimationState.java:118)"

I am trying to solve it but not success. It seem occur when game play call many to showEnemyAttackSign() function.

This is main execution code:

private IceEffectActor attackSign;
private AnimationStateAdapter listener;
private boolean attackSignFinish = true;
private int attackSignCnt = 0;

private final synchronized void showEnemyAttackSign() {
   if(attackSignCnt==0){
      attackSignFinish = false;
      attackSignCnt++;
   }
   if(attackSign !=null&&!attackSignFinish){
      attackSignFinish = true;
      attackSign.setVisible(true);
      attackSign.setAnim("ice", false);
      listener = new AnimationStateAdapter() {
         @Override
          public void event (int trackIndex, Event event) {
              // Inspect and respond to the event here.
            if (event!=null){
               if (event.getString().equalsIgnoreCase("end_ice_fx")) {
                  Gdx.app.error("BattleStage",
                        "Event finish: " + event.getString());
                  attackSign.animState.removeListener(listener);
                  listener = null;
                  attackSignCnt

---

;
                  Gdx.app.error("BattleStage attackSignCnt finish",attackSignCnt+"");
                  if(attackSignCnt==0){
                     attackSignFinish = true;
                  }
                  else{
                     attackSignCnt

---

;
                     showEnemyAttackSign();
                     attackSignFinish = false;
                  }
               }   

            }

     }
  };
  attackSign.animState.addListener(listener);
   }
   else{
      attackSignCnt++;
   }

}

This is Actor class

public class IceEffectActor extends Actor {

   public Skeleton getSkeleton() {
      return skeleton;
   }

   private Skeleton skeleton;
   private SkeletonRenderer skeletonRenderer;
   public AnimationState animState;

   public IceEffectActor() {

  setPosition(0.0f, 600.0f);
  loadAnimation();
   }

   private void loadAnimation() {
      AnimationStateData stateData = new AnimationStateData(Assets.iceFXData);

  animState = new AnimationState(stateData);
  skeleton = new Skeleton(Assets.iceFXData);
  // skeleton.setToSetupPose();
  skeleton.updateWorldTransform();

  skeletonRenderer = new SkeletonRenderer();
   }
   

   public void setAnim(String name, boolean repeat){
      animState.setAnimation(0, name, repeat);
   }

   @Override
   public void act(float delta) {

  skeleton.setX(getX() + getWidth() / 2.0f);
  skeleton.setY(getY());

  skeleton.update(delta);
  skeleton.updateWorldTransform();

  animState.update(delta);
  animState.apply(skeleton);

  super.act(delta);
   }

   @Override
   public void draw(Batch batch, float parentAlpha) {

  skeleton.getColor().a = parentAlpha;

  skeletonRenderer.draw(batch, skeleton);

  super.draw(batch, parentAlpha);

   }

}

Anyone can help me, or give a hint?

I email support, open issue on Github and post here but get nothing respond from Esotericsoftware :bang: .
@Nate can you help me?

Shiu ha scritto

Sorry that we have not gotten back to you on this issue.

I'll make sure to poke Nate and see if he can take a look at it. I'm unfortunately not a programmer and can't help you.

Seem Nate too busy on other project, I also submit issue on Github months ago https://github.com/EsotericSoftware/spine-runtimes/issues/464