From 87713e76d4b464c2997d736e7b705e976fb5e69d Mon Sep 17 00:00:00 2001
From: kzl <17166779@qq.com>
Date: Sat, 19 Feb 2022 02:33:55 +0800
Subject: [PATCH] while dockManager.removeDockWidget , the dockManager()
 returns null (#399)

---
 src/DockWidget.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/DockWidget.cpp b/src/DockWidget.cpp
index 1d4515c92..0d4ead473 100644
--- a/src/DockWidget.cpp
+++ b/src/DockWidget.cpp
@@ -893,7 +893,10 @@ void CDockWidget::setFloating()
 //============================================================================
 void CDockWidget::deleteDockWidget()
 {
-	dockManager()->removeDockWidget(this);
+	auto manager=dockManager();
+	if(manager){
+		manager->removeDockWidget(this);
+	}
 	deleteLater();
 	d->Closed = true;
 }