From bd5663e2cfeafd49973eb3c9e374484d65095479 Mon Sep 17 00:00:00 2001
From: AndreaCatania <info@andreacatania.com>
Date: Wed, 31 Mar 2021 11:53:32 +0200
Subject: [PATCH] Fixes editor crash on closing

Fixes editor crash when the gizmo is destroyed and the `SceneTree` is already freed.

(cherry picked from commit 79f55fcded4f244cf632434f9c1f7cf7ccb0161a)
---
 editor/plugins/spatial_editor_plugin.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/editor/plugins/spatial_editor_plugin.cpp b/editor/plugins/spatial_editor_plugin.cpp
index 97ab8caefa8..ab5f327172d 100644
--- a/editor/plugins/spatial_editor_plugin.cpp
+++ b/editor/plugins/spatial_editor_plugin.cpp
@@ -4470,7 +4470,12 @@ void _update_all_gizmos(Node *p_node) {
 
 void SpatialEditor::update_all_gizmos(Node *p_node) {
 	if (!p_node) {
-		p_node = SceneTree::get_singleton()->get_root();
+		if (SceneTree::get_singleton()) {
+			p_node = SceneTree::get_singleton()->get_root();
+		} else {
+			// No scene tree, so nothing to update.
+			return;
+		}
 	}
 	_update_all_gizmos(p_node);
 }