Discord voice meetups incorrectly deleted

[fildon]

What you did:

• Scheduled and started a Discord meetup.

What happened:

• The meetup ran for a while but then unexpected closed.

Problem description:

• It seems that the bot is automatically cleaning up Discord voice meetups even while people are still in them.

Suggested solution:

• I don't know yet!
• However I would begin investigating around the bot's cleanup function over here:
  https://github.com/kentcdodds/kcd-discord-bot/blob/main/src/meetup/cleanup.ts#L108

[fildon]

Further info:
Both I and @bouwe77 have observed this.
In particular @bouwe77 saw this reproduce three times in one evening.
Do not have exact time stamps however the timings seem to fit with happening around every 15 minutes.

[Aprillion]

So, Rupert tested the bot today and the 15-minute part of the condition looks OK, so it must be that meetupChannel.members.size is 0 even if someone is in the room... getMeetupChannels() in https://github.com/fildon/kcd-discord-bot/blob/06b881370ef907cc79eb0b010d0471a104ffec91/src/meetup/utils.ts#L121 is using a cache, but that was added 4 months ago, not recently...

Could it be that some unrelated code that used to refresh the cache was removed??

[Aprillion]

I checked the code a little and I the most suspicious line of code is https://github.com/fildon/kcd-discord-bot/commit/2db2be725d2124fed0674b34febaa2901e2907d4#r52204857 ... @fildon do you remember if you introduced that line for a good reason or only to make TS happy? (I suspect a runtime error might have been more useful than silencing errors in that place, at least for investigating this issue heh)

[fildon]

I don't think I introduced that line. Looks to be a commit by @kentcdodds 🤔
Even so it doesn't look suspicious to me. It is just handling the case that guild is undefined ... which should probably never happen, but if it does it chooses to return an empty collection when trying to get meetup channels. Which means either way the function is guaranteed to return a collection. That's useful for where it is being enumerated over elsewhere.