Random crashes when joining voice channel

[Fabus1184]

Sometimes when joining a voice channel i get this error:

"2022-11-06 22:32:10 366379639000 ThreadId 1111 !!! Voice Websocket Error - First packet after Select Protocol not Opcode 4 Session Description Ready 
(ReadyPayload {readyPayloadSSRC = 1320121, readyPayloadIP = \"35.214.233.28\", readyPayloadPort = 50001, readyPayloadModes = 
[\"aead_aes256_gcm_rtpsize\",\"aead_aes256_gcm\",\"xsalsa20_poly1305_lite_rtpsize\",\"xsalsa20_poly1305_lite\",\"xsalsa20_poly1305_suffix\",\"xsalsa20_poly1305\"]})"

It happens quite often but seemingly without any cause, disconnecting and connecting again usually throws the same error again.

I found that this barely happens when the voice channel is empty and happens almost everytime when the channel is quite full.

This might have been already thought of here:

discord-haskell-voice/src/Discord/Internal/Voice/WebsocketLoop.hs

Lines 186 to 201 in d07bd26

	-- TODO: currently, we await the Opcode 4 SD right after
	-- Select Protocol, blocking the start of heartbeats until
	-- eventStream. This means there's a delay, so TODO to check
	-- if this delay causes any problems. If it does, keep the
	-- sending here, but receive the SD event in eventStream.
	sessionDescPacket <- ExceptT $
	over _Left ((<> "Failed to get Opcode 4 SD: ") . tshow) <$>
	sendSelectProtocol conn ip port (udpLaunchOpts ^. mode)
	(modeCheck, key) <- ExceptT $ pure $
	maybeToRight ("First packet after Select Protocol " <>
	"not Opcode 4 Session Description " <>
	tshow readyPacket) $
	sessionDescPacket ^? _SessionDescription

[yutotakano]

Thanks! I'll take a look at this when I get home. I appreciate the info you've attached as well.

I did realise when I quickly glanced through the mentioned segment that I'm logging the wrong variable haha (it should log the sessionDescPacket, not readyPacket), hopefully this mistake won't make it harder to debug.