From c82c5b0701a1907e179fcb9849258a5dbcd9770e Mon Sep 17 00:00:00 2001
From: Adam Johnston <adam.johnston00@gmail.com>
Date: Mon, 10 Feb 2025 23:17:01 -0800
Subject: [PATCH] Prevent off-thread errors when generating resource previews
 for animation nodes

---
 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 89338e3837a..bfffc90735a 100644
--- a/editor/plugins/animation_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_tree_editor_plugin.cpp
@@ -234,7 +234,8 @@ bool AnimationTreeEditor::can_edit(const Ref<AnimationNode> &p_node) const {
 }
 
 Vector<String> AnimationTreeEditor::get_animation_list() {
-	if (!singleton->tree || !singleton->is_visible()) {
+	// This can be called off the main thread due to resource preview generation. Quit early in that case.
+	if (!singleton->tree || !Thread::is_main_thread() || !singleton->is_visible()) {
 		// When tree is empty, singleton not in the main thread.
 		return Vector<String>();
 	}