From 1bf00c816f226a5623fbbf6ee82cf36d27c95a04 Mon Sep 17 00:00:00 2001
From: Pavel Merzlyakov <panekmerzlyakov@gmail.com>
Date: Mon, 11 Sep 2023 11:14:55 +0300
Subject: [PATCH] fix DiffCollection

---
 tpl/macro.twig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tpl/macro.twig b/tpl/macro.twig
index b4403fb..e0cbce8 100644
--- a/tpl/macro.twig
+++ b/tpl/macro.twig
@@ -447,7 +447,8 @@ public class {{o.name}} : IRpc
     //old items leftovers are considered removed
     for(; old_i < old_items.Count; old_i++)
     {
-      removed.Add(old_items[old_i].MakeId());
+      if(removed != null)
+        removed.Add(old_items[old_i].MakeId());
       has_diff = true;
     }