From 67f09f79ed5b7fb1b7b52eaf3328dcd32fec8a8b Mon Sep 17 00:00:00 2001
From: Nathan Sweet <nathan.sweet@gmail.com>
Date: Sat, 19 Apr 2025 12:31:28 -0400
Subject: [PATCH] [libgdx] Clear skeleton if update fails instead of crashing.

---
 .../spine/SkeletonViewer.java                 | 26 +++++++++++++++----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java b/spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java
index 07fa08637..47e574c43 100644
--- a/spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java
+++ b/spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java
@@ -32,6 +32,8 @@ package com.esotericsoftware.spine;
 import java.lang.Thread.UncaughtExceptionHandler;
 import java.lang.reflect.Field;
 
+import org.lwjgl.system.Configuration;
+
 import com.badlogic.gdx.ApplicationAdapter;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.Preferences;
@@ -53,7 +55,6 @@ import com.esotericsoftware.spine.Animation.MixBlend;
 import com.esotericsoftware.spine.AnimationState.AnimationStateAdapter;
 import com.esotericsoftware.spine.AnimationState.TrackEntry;
 import com.esotericsoftware.spine.utils.TwoColorPolygonBatch;
-import org.lwjgl.system.Configuration;
 
 import java.awt.Toolkit;
 
@@ -195,6 +196,14 @@ public class SkeletonViewer extends ApplicationAdapter {
 		return true;
 	}
 
+	void clearSkeleton () {
+		skeleton = null;
+		state = null;
+		ui.skinList.clearItems();
+		ui.animationList.clearItems();
+		ui.statusLabel.setText("");
+	}
+
 	void setAnimation (boolean first) {
 		if (!ui.prefsLoaded) return;
 		if (ui.animationList.getSelected() == null) return;
@@ -266,10 +275,17 @@ public class SkeletonViewer extends ApplicationAdapter {
 				skeleton.setupPoseSlots();
 
 			delta = Math.min(delta, 0.032f) * ui.speedSlider.getValue();
-			state.update(delta);
-			state.apply(skeleton);
-			skeleton.update(delta);
-			skeleton.updateWorldTransform(Physics.update);
+			try {
+				state.update(delta);
+				state.apply(skeleton);
+				skeleton.update(delta);
+				skeleton.updateWorldTransform(Physics.update);
+			} catch (Throwable ex) {
+				ex.printStackTrace();
+				ui.toast("Error updating skeleton.");
+				clearSkeleton();
+				return;
+			}
 
 			batch.begin();
 			renderer.draw(batch, skeleton);