From 519b9e3c5299dd737e3739bdebbb3f76398ec96a Mon Sep 17 00:00:00 2001
From: Henning Gruendl <henning.gruendl@qt.io>
Date: Mon, 20 Feb 2023 11:09:25 +0100
Subject: [PATCH] QmlDesigner: Fix startup crash on linux

Task-number: QDS-9198
Change-Id: I1e0f87a941ccbd2131f0e86ae20f7a2d0c2d7856
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
---
 .../advanceddockingsystem/dockfocuscontroller.cpp     | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/libs/advanceddockingsystem/dockfocuscontroller.cpp b/src/libs/advanceddockingsystem/dockfocuscontroller.cpp
index c0c632cb989..a5878ba856c 100644
--- a/src/libs/advanceddockingsystem/dockfocuscontroller.cpp
+++ b/src/libs/advanceddockingsystem/dockfocuscontroller.cpp
@@ -105,11 +105,16 @@ namespace ADS
                              q, &DockFocusController::onFocusedDockAreaViewToggled);
         }
 
-        auto newFloatingWidget = m_focusedDockWidget->dockContainer()->floatingWidget();
+        auto dockContainer = m_focusedDockWidget->dockContainer();
+        FloatingDockContainer *newFloatingWidget = nullptr;
+
+        if (dockContainer)
+            newFloatingWidget = dockContainer->floatingWidget();
+
         if (newFloatingWidget)
             newFloatingWidget->setProperty("FocusedDockWidget", QVariant::fromValue(dockWidget));
 
-    #ifdef Q_OS_LINUX
+#ifdef Q_OS_LINUX
         // This code is required for styling the floating widget titlebar for linux
         // depending on the current focus state
         if (m_floatingWidget == newFloatingWidget)
@@ -122,7 +127,7 @@ namespace ADS
 
         if (m_floatingWidget)
             updateFloatingWidgetFocusStyle(m_floatingWidget, true);
-    #endif
+#endif
 
         if (old != dockWidget)
             emit m_dockManager->focusedDockWidgetChanged(old, dockWidget);