Panic when logged out

[nogweii]

When running tailscale-systray when the daemon is not running it appears as normal. Clicking "Connect" in the menu prompts me to start the daemon, so I ran systemctl start tailscaled. Once the daemon starts the systray program crashes.

Running it in the terminal:

$ tailscale-systray 
panic: runtime error: index out of range [0] with length 0

goroutine 23 [running]:
main.onReady.func4()
github.com/mattn/tailscale-systray/main.go:155 +0x885
created by main.onReady
github.com/mattn/tailscale-systray/main.go:121 +0x43d

Running tailscale status in the terminal:

Text output

Logged out

JSON output

{
"Version": "1.20.4",
"BackendState": "NeedsLogin",
"AuthURL": "",
"TailscaleIPs": null,
"Self": {
"ID": "",
"PublicKey": "nodekey:0000000000000000000000000000000000000000000000000000000000000000",
"HostName": "local-machine",
"DNSName": "",
"OS": "linux",
"UserID": 0,
"TailscaleIPs": null,
"Addrs": [],
"CurAddr": "",
"Relay": "",
"RxBytes": 0,
"TxBytes": 0,
"Created": "0001-01-01T00:00:00Z",
"LastWrite": "0001-01-01T00:00:00Z",
"LastSeen": "0001-01-01T00:00:00Z",
"LastHandshake": "0001-01-01T00:00:00Z",
"Online": false,
"KeepAlive": false,
"ExitNode": false,
"ExitNodeOption": false,
"Active": false,
"PeerAPIURL": null,
"InNetworkMap": false,
"InMagicSock": false,
"InEngine": false
},
"Health": [
"state=NeedsLogin, wantRunning=false"
],
"MagicDNSSuffix": "",
"CertDomains": null,
"Peer": null,
"User": null
}

Seems like it doesn't handle when .TailscaleIPs is null.

Versions

• Tailscale 1.20.4
• tailscale-systray on git 6434789
• KDE Plasma 5.24.1
• Arch Linux (with kernel 5.16.10-zen)

[nogweii]

After logging in using a terminal, the systray works just fine.

Not sure if it matters, but this is on a fresh machine, that had only just recently installed tailscale. Never logged in before.

[prabirshrestha]

Hit the same issue. Seems like it always expects there to be 1 ip address. When not signed it it will crash.

tailscale-systray/main.go

Lines 154 to 156 in 8e943de

	mu.Lock()
	myIP = status.Self.TailscaleIPs[0]
	mu.Unlock()

[RahulSriram]

I had the same issue as mentioned here, I have opened a PR with a fix for it now