From 3d889c59d2e42789b90558815890684eb316ae06 Mon Sep 17 00:00:00 2001
From: Le Gia Bao <legiabao7300@gmail.com>
Date: Mon, 6 Apr 2026 23:16:55 -0400
Subject: [PATCH] Fix #118218: BoneAttachment3D throws !is_inside_tree()

---
 scene/3d/bone_attachment_3d.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scene/3d/bone_attachment_3d.cpp b/scene/3d/bone_attachment_3d.cpp
index c7b16969df..d6deb6b2e1 100644
--- a/scene/3d/bone_attachment_3d.cpp
+++ b/scene/3d/bone_attachment_3d.cpp
@@ -170,6 +170,9 @@ void BoneAttachment3D::_transform_changed() {
 
 		Transform3D our_trans = get_transform();
 		if (use_external_skeleton) {
+			if (!sk->is_inside_tree()) {
+				return;
+			}
 			our_trans = sk->get_global_transform().affine_inverse() * get_global_transform();
 		}