Bot occasionally crashes with invalid channel ID: undefined

[CyberFlameGO]

Hi!! I'm encountering some crashes whilst running the bot - any help in fixing this (past validating that the getOrFetchChannel parameter isn't undefined) would be lovely!

Here are some stacktraces if that helps things

Error: Error: Invalid channel ID: undefined
    at Client.getChannel (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/Client.js:2447:13)
    at new Message (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:65:33)
    at /home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:94:21
    at Array.map (<anonymous>)
    at new Message (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:85:54)
    at Collection.add (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:61:13)
    at Shard.wsEvent (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:946:55)
    at Shard.onPacket (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:398:16)
    at Shard._onWSMessage (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:2583:21)
    at WebSocket.emit (node:events:518:28)
    at Receiver.receiverOnMessage (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/websocket.js:1220:20)
    at Receiver.emit (node:events:518:28)
    at Receiver.dataMessage (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/receiver.js:596:14)
    at Receiver.getData (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/receiver.js:496:10)
    at Receiver.startLoop (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/receiver.js:167:16)
    at Receiver._write (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/receiver.js:94:10)
Error: Error: Invalid channel ID: undefined
    at Client.getChannel (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/Client.js:2447:13)
    at new Message (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:65:33)
    at Collection.add (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:61:13)
    at Collection.update (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:35:19)
    at /home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:92:38
    at Array.map (<anonymous>)
    at new Message (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:85:54)
    at Collection.add (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:61:13)
    at Collection.update (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:35:19)
    at new Message (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/structures/Message.js:119:51)
    at Collection.add (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/util/Collection.js:61:13)
    at Shard.wsEvent (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:946:55)
    at Shard.onPacket (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:398:16)
    at Shard._onWSMessage (/home/ubuntu/discord/modmailbot/node_modules/eris/lib/gateway/Shard.js:2583:21)
    at WebSocket.emit (node:events:518:28)
    at Receiver.receiverOnMessage (/home/ubuntu/discord/modmailbot/node_modules/ws/lib/websocket.js:1220:20)

[squidistaken]

Hi, also getting this issue frequently! Just bumping so it gets more attention. :)

[M4R70]

same here! this is all the error logs I could retrieve

Error: Error: Invalid channel ID: undefined at Client.getChannel (/home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/Client.js:2447:13) at new Message (/home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/structures/Message.js:65:33) at /home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/structures/Message.js:94:21 at Array.map (<anonymous>) at new Message (/home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/structures/Message.js:85:54) at Collection.add (/home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/util/Collection.js:61:13) at Shard.wsEvent (/home/ubuntu/modmail/modmailbot-3.8.0/node_modules/eris/lib/gateway/Shard.js:946:55) ...stack trace truncated to 8 lines

[Nathack-dev]

Same problem, it happens that the bot crashes several times in an hour.

[rubyowo]

From my (very limited) testing, the bot crashes since it tries to fetch the channel of a forwarded message from a server the bot isn't in.

Can someone confirm my theory?
It also appears that forwarded messages (regardless if the bot is in the server or not) just don't show up in the index thread/logs 🤔

[rubyowo]

Seems that eris already has an open PR to fix this: abalabahaha/eris#1582