From 97a3413ddf702197ab9ddb86489d6f5d9a991a03 Mon Sep 17 00:00:00 2001
From: 1zuna <marco@ccbluex.net>
Date: Tue, 12 Mar 2024 02:12:27 +0100
Subject: [PATCH] fix shutdown concurrent modification issue

fixes https://github.com/CCBlueX/LiquidBounce/issues/2238
---
 java/org/cef/CefClient.java | 36 +++++++-----------------------------
 1 file changed, 7 insertions(+), 29 deletions(-)

diff --git a/java/org/cef/CefClient.java b/java/org/cef/CefClient.java
index cb3a58c7..f34d1c83 100644
--- a/java/org/cef/CefClient.java
+++ b/java/org/cef/CefClient.java
@@ -4,45 +4,22 @@
 
 package org.cef;
 
-import org.cef.browser.CefBrowser;
-import org.cef.browser.CefBrowserFactory;
-import org.cef.browser.CefFrame;
-import org.cef.browser.CefMessageRouter;
-import org.cef.browser.CefRequestContext;
-import org.cef.callback.CefAuthCallback;
-import org.cef.callback.CefBeforeDownloadCallback;
-import org.cef.callback.CefCallback;
-import org.cef.callback.CefContextMenuParams;
-import org.cef.callback.CefDownloadItem;
-import org.cef.callback.CefDownloadItemCallback;
-import org.cef.callback.CefDragData;
-import org.cef.callback.CefFileDialogCallback;
-import org.cef.callback.CefJSDialogCallback;
-import org.cef.callback.CefMenuModel;
-import org.cef.callback.CefPrintDialogCallback;
-import org.cef.callback.CefPrintJobCallback;
+import org.cef.browser.*;
+import org.cef.callback.*;
 import org.cef.handler.*;
 import org.cef.misc.BoolRef;
 import org.cef.misc.CefAudioParameters;
 import org.cef.misc.CefPrintSettings;
-import org.cef.misc.StringRef;
 import org.cef.network.CefRequest;
 import org.cef.network.CefRequest.TransitionType;
-import org.cef.network.CefResponse;
-import org.cef.network.CefURLRequest;
-
-import java.awt.Dimension;
-import java.awt.Point;
-import java.awt.Rectangle;
-import java.beans.PropertyChangeEvent;
-import java.beans.PropertyChangeListener;
+
+import java.awt.*;
 import java.nio.ByteBuffer;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Vector;
 
-import javax.swing.SwingUtilities;
-
 /**
  * Client that owns a browser and renderer.
  */
@@ -511,7 +488,8 @@ private void cleanupBrowser(int identifier) {
                 browser_.remove(identifier);
             } else if (!browser_.isEmpty()) {
                 // Close all browsers.
-                Collection<CefBrowser> browserList = browser_.values();
+                Collection<CefBrowser> browserList = new ArrayList<>(browser_.values());
+
                 for (CefBrowser browser : browserList) {
                     browser.close(true);
                 }