From 15d893d3cce250523b61da8a4dcd83947a6d36ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20K=C3=A4berich?= <j.kaeberich@gmx.de>
Date: Thu, 8 Feb 2024 16:07:54 +0100
Subject: [PATCH] prevent crash when device disconnects while a dialog acquired
 control

---
 Software/PC_Application/LibreVNA-GUI/modehandler.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Software/PC_Application/LibreVNA-GUI/modehandler.cpp b/Software/PC_Application/LibreVNA-GUI/modehandler.cpp
index c927e4e..af5a7e4 100644
--- a/Software/PC_Application/LibreVNA-GUI/modehandler.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/modehandler.cpp
@@ -74,7 +74,9 @@ void ModeHandler::activate(Mode * mode)
 
 void ModeHandler::deactivate(Mode* mode)
 {
-    mode->deactivate();
+    if(mode) {
+        mode->deactivate();
+    }
     activeMode = nullptr;
 }