From 7c16dddbd0a9d6c3ba699e341cb7cd2623164857 Mon Sep 17 00:00:00 2001
From: redglow <redglow@disroot.org>
Date: Fri, 17 Jul 2026 15:44:49 +0200
Subject: [PATCH] fix: check validity of node instance before accessing it.

---
 addons/GodotDI/Editor/Plugin.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/addons/GodotDI/Editor/Plugin.cs b/addons/GodotDI/Editor/Plugin.cs
index 0414db1..fe5a01f 100644
--- a/addons/GodotDI/Editor/Plugin.cs
+++ b/addons/GodotDI/Editor/Plugin.cs
@@ -77,6 +77,9 @@ public partial class Plugin : EditorPlugin
         // mark debounce as completed
         _sceneTreeTimer = null;
 
+        // check that the instance is still valid after debouncing (could have been disposed)
+        if (!IsInstanceValid(sceneRoot)) return;
+
         var sceneNodes = sceneRoot.FindChildren("*").Where(node => node.Owner == sceneRoot).Append(sceneRoot).ToList();
         GD.Print($"Updating injection for root {sceneRoot.Name}");