panic on ProcessPublishMessage

[MarcMagnin]

Hi,
I'm not sure what can cause this issue but sometimes when a client appear to somehow disconnect I'm getting a bunch of:

ERROR   broker  broker/client.go:252    process message for psub error,         {"error": "write tcp 127.0.0.1:1888->127.0.0.1:41254: use of closed network connection", "ClientID": "e0d159c9-0bc3-4f88-8e96-e5a33fa4d1dd"} 
github.com/fhmq/hmq/broker.(*client).ProcessPublishMessage
        github.com/fhmq/hmq/broker/client.go:252

which seems to terminate at some point with a panic:

[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x91906a]

goroutine 5798521 [running]:
bitbucket.org/digitalisio/axonops/vendor/github.com/eclipse/paho.mqtt.golang/packets.(*PublishPacket).Write(0xc5142c6f40, 0x0, 0x0, 0x0, 0x0)
        github.com/eclipse/paho.mqtt.golang/packets/publish.go:39 +0x25a
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/broker.(*client).WriterPacket(0xc420599a40, 0xd74a00, 0xc5142c6f40, 0x0, 0x0)
        github.com/fhmq/hmq/broker/client.go:428 +0x11c
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/broker.(*client).ProcessPublishMessage(0xc423370c80, 0xc5142c6f40)
        github.com/fhmq/hmq/broker/client.go:250 +0x1c9
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/broker.(*client).ProcessPublish(0xc423370c80, 0xc5142c6f40)
        github.com/fhmq/hmq/broker/client.go:185 +0x587
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/broker.ProcessMessage(0xc486b327e0)
        github.com/fhmq/hmq/broker/client.go:144 +0x2dd
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/broker.(*Broker).SubmitWork.func1()
        github.com/fhmq/hmq/broker/broker.go:115 +0x2a
bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/pool.startWorker.func1(0xc4203a64e0, 0xc4202e49c0)
        github.com/fhmq/hmq/pool/pool.go:160 +0x68
created by bitbucket.org/digitalisio/axonops/vendor/github.com/fhmq/hmq/pool.startWorker
        github.com/fhmq/hmq/pool/pool.go:145 +0x49

Regards

[aureolex]

me to