From aff5b3de94ca9fdd7bace26ec57c19aca9e4af28 Mon Sep 17 00:00:00 2001
From: Jiralite <33201955+Jiralite@users.noreply.github.com>
Date: Mon, 10 Jul 2023 23:11:32 +0100
Subject: [PATCH] fix(ChannelUpdate): check against unknown channels

---
 .../discord.js/src/client/actions/ChannelUpdate.js  | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/discord.js/src/client/actions/ChannelUpdate.js b/packages/discord.js/src/client/actions/ChannelUpdate.js
index 6b432c08bfb9..7ca331aacae9 100644
--- a/packages/discord.js/src/client/actions/ChannelUpdate.js
+++ b/packages/discord.js/src/client/actions/ChannelUpdate.js
@@ -6,14 +6,23 @@ const { createChannel } = require('../../util/Channels');
 class ChannelUpdateAction extends Action {
   handle(data) {
     const client = this.client;
-
     let channel = client.channels.cache.get(data.id);
+
     if (channel) {
       const old = channel._update(data);
 
       if (channel.type !== data.type) {
         const newChannel = createChannel(this.client, data, channel.guild);
-        for (const [id, message] of channel.messages.cache) newChannel.messages.cache.set(id, message);
+
+        if (!newChannel) {
+          this.client.channels.cache.delete(channel.id);
+          return {};
+        }
+
+        if (channel.isTextBased() && newChannel.isTextBased()) {
+          for (const [id, message] of channel.messages.cache) newChannel.messages.cache.set(id, message);
+        }
+
         channel = newChannel;
         this.client.channels.cache.set(channel.id, channel);
       }