-

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x4cc1d7]

goroutine 116 [running]:
panic(0x624860, 0xc4200120a0)
	/usr/local/go/src/runtime/panic.go:500 +0x1a1
github.com/syncthing/syncthing/vendor/github.com/ccding/go-stun/stun.(*Client).Keepalive(0xc420825cc8, 0xc420462000, 0x0, 0x1)
	/Users/jb/src/github.com/syncthing/syncthing/vendor/github.com/ccding/go-stun/stun/client.go:122 +0xe7
github.com/syncthing/syncthing/lib/connections.(*kcpListener).stunRenewal(0xc4211a4100, 0xb631c0, 0xc4219d2380)
	/Users/jb/src/github.com/syncthing/syncthing/lib/connections/kcp_listen.go:237 +0x85a
created by github.com/syncthing/syncthing/lib/connections.(*kcpListener).Serve
	/Users/jb/src/github.com/syncthing/syncthing/lib/connections/kcp_listen.go:90 +0x6a8