[Bug]: GetUser for specific user returns null

[Draco18s]

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• I double checked the docs and couldn't find any useful information.

Verify Issue Source

• I verified the issue was caused by Discord.Net.

Check your intents

• I double checked that I have the required intents.

Description

I have the code (sample below). When a message comes in on a guild text channel that @-mentions a user who has been converted to non-discriminator username, this code fails to fetch that user, returning null.

But it's just this ONE user as far as I can tell. In my discord client I am able to see, mention, and so on without any issue, but the bot (which gets @-mentions as pure IDs and has to convert those to usernames/display names) outright fails to fetch the user's info.

I am willing to supply the offending user ID (privately) if required.

Version

3.10.0

Working Version

No response

Logs

n/a as the crash occurs in my code

Sample

	public static SocketUser GetUser(ulong id, ulong channelID)
	{
		// if we can just get the user, get the user
		SocketUser s = Instance._client.GetUser(id);
		if (s != null) return s;
		
		// if this is a channel and the user is in the user list, get that user
		SocketChannel chan = Instance._client.GetChannel(channelID);
		IReadOnlyCollection<SocketUser> a = chan.Users;
		foreach (SocketUser? o in a)
		{
			if (o.Id == id)
				return o;
		}

		// if both of those failed, get the current guild and get the user from there
		if (chan is SocketTextChannel g)
		{
			s = g.Guild.GetUser(id);
			if (s != null) return s;
		}
		return null; //well f-ck
	}

Packages

System.Data.SQLite v1.0.117
Word2vec.Tools v2.1.0

(Both used in other sections of the bot for storing and retrieving "memories")

[Misha-133]

Try using the IGuild.GetUserAsync() method instead of GetUser
GetUser only fetches users from client's cache, while the GetUserAsync does a API request if it can't find the user in cache.

[Draco18s]

Doh. Of course 🤦‍♂️