From 621b9a1bfe9660717f792945595ebfb3cd3ca305 Mon Sep 17 00:00:00 2001
From: Rindbee <idleman@yeah.net>
Date: Fri, 2 Sep 2022 10:30:08 +0800
Subject: [PATCH] Fix getting an error message when repeatedly entering and
 exiting the tree

---
 scene/main/canvas_item.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scene/main/canvas_item.cpp b/scene/main/canvas_item.cpp
index 61a7600664d..65e7ba3e674 100644
--- a/scene/main/canvas_item.cpp
+++ b/scene/main/canvas_item.cpp
@@ -338,6 +338,7 @@ void CanvasItem::_notification(int p_what) {
 			}
 			if (window) {
 				window->disconnect(SceneStringNames::get_singleton()->visibility_changed, callable_mp(this, &CanvasItem::_window_visibility_changed));
+				window = nullptr;
 			}
 			global_invalid = true;
 			parent_visible_in_tree = false;