panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x0 pc=0x53796c]
goroutine 52 [running]:
panic(0x9cd160, 0x11690030)
/usr/local/go/src/runtime/panic.go:464 +0x326
sync/atomic.AddUint64(0x116e62d4, 0x89, 0x0, 0x339418d8, 0x9852c0)
/usr/local/go/src/sync/atomic/asm_386.s:112 +0xc
main.(*server).AddBytesSent(0x116e62c0, 0x89, 0x0)
/home/username/go/src/github.com/qchain/btcd/server.go:1928 +0x3b
main.(*serverPeer).OnWrite(0x11680120, 0x116b4000, 0x89, 0x339418b0, 0x116a4120, 0x0, 0x0)
/home/username/go/src/github.com/qchain/btcd/server.go:878 +0x31
main.(*serverPeer).OnWrite-fm(0x116b4000, 0x89, 0x339418b0, 0x116a4120, 0x0, 0x0)
/home/username/go/src/github.com/qchain/btcd/server.go:1438 +0x50
github.com/qchain/btcd/peer.(*Peer).writeMessage(0x116b4000, 0x339418b0, 0x116a4120, 0x0, 0x0)
/home/username/go/src/github.com/qchain/btcd/peer/peer.go:1183 +0x442
github.com/qchain/btcd/peer.(*Peer).outHandler(0x116b4000)
/home/username/go/src/github.com/qchain/btcd/peer/peer.go:1836 +0x2ef
created by github.com/qchain/btcd/peer.(*Peer).start
/home/username/go/src/github.com/qchain/btcd/peer/peer.go:1996 +0x235