fix: Check left guilds & clear expected guilds

packages/discord.js/src/client/actions/ActionsManager.js

@@ -19,6 +19,7 @@ class ActionsManager {
     this.GuildChannelsPositionUpdate = this.load(
       require('./GuildChannelsPositionUpdate.js').GuildChannelsPositionUpdateAction,
     );
+    this.GuildDelete = this.load(require('./GuildDelete.js').GuildDeleteAction);
     this.GuildEmojiCreate = this.load(require('./GuildEmojiCreate.js').GuildEmojiCreateAction);
     this.GuildEmojiDelete = this.load(require('./GuildEmojiDelete.js').GuildEmojiDeleteAction);
     this.GuildEmojiUpdate = this.load(require('./GuildEmojiUpdate.js').GuildEmojiUpdateAction);

packages/discord.js/src/client/actions/GuildDelete.js

@@ -0,0 +1,16 @@
+'use strict';
+
+const { Action } = require('./Action.js');
+
+class GuildDeleteAction extends Action {
+  handle(guild) {
+    const { client } = this;
+
+    for (const channel of guild.channels.cache.values()) client.channels._remove(channel.id);
+    client.voice.adapters.get(guild.id)?.destroy();
+
+    client.guilds.cache.delete(guild.id);
+  }
+}
+
+exports.GuildDeleteAction = GuildDeleteAction;

packages/discord.js/src/client/websocket/handlers/GUILD_DELETE.js

@@ -22,10 +22,7 @@ module.exports = (client, { d: data }) => {
     return;
   }
 
-  for (const channel of guild.channels.cache.values()) client.channels._remove(channel.id);
-  client.voice.adapters.get(data.id)?.destroy();
-
-  client.guilds.cache.delete(guild.id);
+  client.actions.GuildDelete.handle(guild);
 
   /**
    * Emitted whenever a guild kicks the client or the guild is deleted/left.

packages/discord.js/src/client/websocket/handlers/READY.js

@@ -14,12 +14,18 @@ module.exports = (client, { d: data }, shardId) => {
     client.users.cache.set(client.user.id, client.user);
   }
 
+  client.expectedGuilds.clear();
   for (const guild of data.guilds) {
     client.expectedGuilds.add(guild.id);
     guild.shardId = shardId;
     client.guilds._add(guild);
   }
 
+  for (const guild of client.guilds.cache.values()) {
+    if (client.expectedGuilds.has(guild.id)) continue;
+    client.actions.GuildDelete.handle(guild);
+  }
+
   if (client.application) {
     client.application._patch(data.application);
   } else {