Panic in partition multiplexer

[horkhe]

</_[0]/cons[0]/G:kraken[0]/mux[0]> paniced: runtime error: index out of range, stack=goroutine 195 [running]:
runtime/debug.Stack(0xc420856c80, 0x7215c0, 0xc420012070)
	/usr/local/go/src/runtime/debug/stack.go:24 +0x79
github.com/mailgun/kafka-pixy/actor.Spawn.func1.1(0xc4202639e0)
	/go/src/github.com/mailgun/kafka-pixy/actor/actor.go:63 +0xe5
panic(0x7215c0, 0xc420012070)
	/usr/local/go/src/runtime/panic.go:458 +0x243
github.com/mailgun/kafka-pixy/consumer/multiplexer.(*T).run(0xc420184f50)
	/go/src/github.com/mailgun/kafka-pixy/consumer/multiplexer/multiplexer.go:193 +0x607
github.com/mailgun/kafka-pixy/consumer/multiplexer.(*T).(github.com/mailgun/kafka-pixy/consumer/multiplexer.run)-fm()
	/go/src/github.com/mailgun/kafka-pixy/consumer/multiplexer/multiplexer.go:136 +0x2a
github.com/mailgun/kafka-pixy/actor.Spawn.func1(0xc420184f88, 0xc4202639e0, 0xc420249d80)
	/go/src/github.com/mailgun/kafka-pixy/actor/actor.go:68 +0xca
created by github.com/mailgun/kafka-pixy/actor.Spawn
	/go/src/github.com/mailgun/kafka-pixy/actor/actor.go:69 +0x58