From d5f3987cf7e04c05d3c46eee21a68c8a5831991c Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Thu, 3 Mar 2016 12:53:31 +1030
Subject: [PATCH] Fix warning when deleting discussion forever

Related to flarum/core#842
---
 extensions/tags/src/Listener/UpdateTagMetadata.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/extensions/tags/src/Listener/UpdateTagMetadata.php b/extensions/tags/src/Listener/UpdateTagMetadata.php
index e0a37590a..6a6dea51c 100755
--- a/extensions/tags/src/Listener/UpdateTagMetadata.php
+++ b/extensions/tags/src/Listener/UpdateTagMetadata.php
@@ -107,6 +107,10 @@ class UpdateTagMetadata
      */
     protected function updateTags($discussion, $delta = 0, $tags = null)
     {
+        if (! $discussion) {
+            return;
+        }
+
         if (! $tags) {
             $tags = $discussion->tags;
         }