From 0c54cf208588c738488f34baaa46f8dc94f3d5ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Steven=20K=C3=B6hler?= <info@stevenkoehler.de>
Date: Sun, 12 Jun 2022 21:48:07 +0200
Subject: [PATCH] Fixed an access violation that crashes the whole server
 whenever the 'ApplicationCreator function' returns a nullptr

---
 src/web/WebSession.C | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/web/WebSession.C b/src/web/WebSession.C
index 96ac3ac4e7..224ff796b3 100644
--- a/src/web/WebSession.C
+++ b/src/web/WebSession.C
@@ -680,9 +680,15 @@ bool WebSession::start(WebResponse *response)
 {
   try {
     app_ = controller_->doCreateApplication(this).release();
-    if (!app_->internalPathValid_)
-      if (response->responseType() == WebResponse::ResponseType::Page)
-        response->setStatus(404);
+    if (app_) {
+      if (!app_->internalPathValid_) {
+        if (response->responseType() == WebResponse::ResponseType::Page) {
+          response->setStatus(404);
+        }
+      }
+    } else {
+      throw WException("WebSession::start: ApplicationCreator returned a nullptr");
+    }
   } catch (std::exception& e) {
     app_ = nullptr;