From 0b3c073c9ef44380ae2c8d12aed30c5d5535a4f7 Mon Sep 17 00:00:00 2001
From: Magian <zang_magian@163.com>
Date: Wed, 2 Aug 2023 22:45:09 +0800
Subject: [PATCH] Fix the error when clicking AnimationTree in the editor

---
 editor/plugins/animation_tree_editor_plugin.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/editor/plugins/animation_tree_editor_plugin.cpp b/editor/plugins/animation_tree_editor_plugin.cpp
index 9fa1e63dcb19..7b5f8aa7f771 100644
--- a/editor/plugins/animation_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_tree_editor_plugin.cpp
@@ -241,7 +241,8 @@ bool AnimationTreeEditor::can_edit(const Ref<AnimationNode> &p_node) const {
 }
 
 Vector<String> AnimationTreeEditor::get_animation_list() {
-	if (!singleton->is_visible()) {
+	if (!singleton->tree || !singleton->is_visible()) {
+		// When tree is empty, singleton not in the main thread.
 		return Vector<String>();
 	}