From 86e571d1223b5a4e1bb8ab374b03c3795c503a7a Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Mon, 29 Jun 2020 19:04:37 +0200
Subject: [PATCH] Dispose class change subscriptions.

---
 src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs
index bf7c62f5fc..cb5f5b1fda 100644
--- a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs
+++ b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs
@@ -11,6 +11,7 @@ namespace Avalonia.Diagnostics.ViewModels
 {
     internal class TreeNode : ViewModelBase, IDisposable
     {
+        private IDisposable _classesSubscription;
         private string _classes;
         private bool _isExpanded;
 
@@ -32,7 +33,7 @@ namespace Avalonia.Diagnostics.ViewModels
                         x => control.Classes.CollectionChanged -= x)
                     .TakeUntil(removed);
 
-                classesChanged.Select(_ => Unit.Default)
+                _classesSubscription = classesChanged.Select(_ => Unit.Default)
                     .StartWith(Unit.Default)
                     .Subscribe(_ =>
                     {
@@ -105,6 +106,7 @@ namespace Avalonia.Diagnostics.ViewModels
 
         public void Dispose()
         {
+            _classesSubscription.Dispose();
             Children.Dispose();
         }