From 52196b7954532404ed8b67ec5a0cb12126c603c5 Mon Sep 17 00:00:00 2001
From: Michael Seibt <m.seibt@aeromaritime.de>
Date: Thu, 26 Mar 2026 15:09:10 +0100
Subject: [PATCH] WT-14441: Avoid segfault on WApplication::setAsFocus

during destruction and generally set quitted_ first on destruction
---
 src/Wt/WApplication.C | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Wt/WApplication.C b/src/Wt/WApplication.C
index 14c330c99..a3af49162 100644
--- a/src/Wt/WApplication.C
+++ b/src/Wt/WApplication.C
@@ -391,6 +391,8 @@ std::string WApplication::onePixelGifUrl()
 
 WApplication::~WApplication()
 {
+  quitted_ = true;
+
 #ifndef WT_TARGET_JAVA
   Configuration& conf = env().server()->configuration();
   if (conf.servePrivateResourcesToBots() && env().agentIsSpiderBot()) {
@@ -1147,6 +1149,8 @@ EventSignal<>& WApplication::globalEscapePressed()
 
 void WApplication::setAsFocus(const std::string& id)
 {
+  if (!root() || hasQuit())
+    return;
   WWidget* w = root()->findById(id);
   if (w) {
     w->setFocus();