From 124ad35677ebe4c3bd55ce938ef3633704e9adce Mon Sep 17 00:00:00 2001
From: MeFisto94 <MeFisto94@users.noreply.github.com>
Date: Mon, 27 Jan 2020 09:03:25 +0100
Subject: [PATCH] Fixes #1249 - Don't hang up when destroy is called multiple
 times (#1250)

---
 .../java/com/jme3/system/lwjgl/LwjglAbstractDisplay.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/jme3-lwjgl/src/main/java/com/jme3/system/lwjgl/LwjglAbstractDisplay.java b/jme3-lwjgl/src/main/java/com/jme3/system/lwjgl/LwjglAbstractDisplay.java
index 528c788ea..e2be6a78d 100644
--- a/jme3-lwjgl/src/main/java/com/jme3/system/lwjgl/LwjglAbstractDisplay.java
+++ b/jme3-lwjgl/src/main/java/com/jme3/system/lwjgl/LwjglAbstractDisplay.java
@@ -266,7 +266,11 @@ public abstract class LwjglAbstractDisplay extends LwjglContext implements Runna
         this.autoFlush = enabled;
     }
 
-    public void destroy(boolean waitFor){
+    public void destroy(boolean waitFor) {
+        if (needClose.get()) {
+            return; // Already destroyed
+        }
+
         needClose.set(true);
         if (waitFor)
             waitFor(false);