Fix Golang Script Error -- 3

I have a problem when I run my golang script, I want to get it to fix.

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x6e89db]

github.com/proxy.(*ProxyServer).setDeadline(0xc000121180, 0x0)
/home/pool/build/_workspace/src/github.com/pool/proxy/stratum.go:173 +0x3b
github.com/pool/proxy.(*ProxyServer).broadcastNewJobs.func1(0xc000022280)
/home/pool/build/_workspace/src/github.com/pool/proxy/stratum.go:216 +0x13d
created by github.com/ei8ht187/ethash-mining-pool/proxy.(*ProxyServer).broadcastNewJobs
/home/pool/build/_workspace/src/github.com/ei8ht187/pool/proxy/stratum.go:209 +0x305