voiceChannel.leave() : TypeError: Cannot read property 'leave' of null

[astariul]

When leaving a channel, I'm meeting the following error :

C:\Users\remon\Documents\workspace\discord-voice-recorder\bin\commands.js:48
voiceChannel.leave();
^

TypeError: Cannot read property 'leave' of null
at Object.exports.exit (C:\Users\remon\Documents\workspace\discord-voice-recorder\bin\commands.js:48:18)
at Client. (C:\Users\remon\Documents\workspace\discord-voice-recorder\index.js:22:51)
at Client.emit (events.js:376:20)
at MessageCreateAction.handle (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\discord.js\src\client\actions\MessageCreate.js:31:14)
at Object.module.exports [as MESSAGE_CREATE] (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)
at WebSocketManager.handlePacket (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\discord.js\src\client\websocket\WebSocketManager.js:345:31)
at WebSocketShard.onPacket (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\discord.js\src\client\websocket\WebSocketShard.js:443:22)
at WebSocketShard.onMessage (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\discord.js\src\client\websocket\WebSocketShard.js:300:10)
at WebSocket.onMessage (C:\Users\remon\Documents\workspace\discord-voice-recorder\node_modules\ws\lib\event-target.js:132:16)
at WebSocket.emit (events.js:376:20)

Any idea where it comes from and how to fix it ?

[astariul]

Note : it happens only when the use leave the channel first.

When the user stay in the channel and send the command, it work properly.

To reproduce :

-> Cmd "enter"
-> Connect to discord voice channel
-> Say something
-> Disconnect from voice channel
-> Cmd "exit"

[astariul]

Ok I changed :

const { channel: voiceChannel, connection: conn } = msg.guild.voiceStates.cache.last();

into

    var { channel: voiceChannel, connection: conn } = msg.guild.voiceStates.cache.last();
    if (voiceChannel == null){
        var { channel: voiceChannel, connection: conn } = msg.guild.voiceStates.cache.first();
    }

and it seems to work. I don't know enough javascript to find the actual solution, but this dirty work-around is fine for my usage.

[astariul]

Turned out my fix does not work all the time...