From ee09375bba0d81be33c885261c9694fc2c2d726e Mon Sep 17 00:00:00 2001
From: Wang Yu <wangyu@uniontech.com>
Date: Fri, 16 Aug 2024 09:11:39 +0800
Subject: [PATCH] Fix Windows drag and drop crash

When QGuiApplication::primaryScreen() is empty,
dragging it causes a crash

Change-Id: I6c5e48be44db90acec5126957bee60b8514b10a7
Pick-to: 6.7 6.5
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
(cherry picked from commit f8e7dfe93ab9622f77aade23707cd6f0b9386379)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/windows/qwindowsdrag.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/plugins/platforms/windows/qwindowsdrag.cpp b/src/plugins/platforms/windows/qwindowsdrag.cpp
index ea4cac5a592..5d3a47c22fd 100644
--- a/src/plugins/platforms/windows/qwindowsdrag.cpp
+++ b/src/plugins/platforms/windows/qwindowsdrag.cpp
@@ -254,8 +254,9 @@ void QWindowsOleDropSource::createCursors()
         if (const QScreen *primaryScreen = QGuiApplication::primaryScreen())
             platformScreen = primaryScreen->handle();
     }
-    Q_ASSERT(platformScreen);
-    QPlatformCursor *platformCursor = platformScreen->cursor();
+    QPlatformCursor *platformCursor = nullptr;
+    if (platformScreen)
+        platformCursor = platformScreen->cursor();
 
     if (GetSystemMetrics (SM_REMOTESESSION) != 0) {
         /* Workaround for RDP issues with large cursors.