root@cgrates:~# ngrep -t -W byline port 2012 -d lo
interface: lo (127.0.0.0/255.0.0.0)
filter: (ip or ip6) and ( port 2012 )


#
T 2018/03/22 17:23:39.774951 127.0.0.1:37216 -> 127.0.0.1:2012 [AP]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xa8e497]

goroutine 59 [running]:
github.com/cgrates/cgrates/engine.(*AttrSProcessEventReply).Digest(0x0, 0xc4202a14b0, 0xc4200882a0)
    /usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/engine/attributes.go:137 +0x37
github.com/cgrates/cgrates/sessions.(*SMGeneric).BiRPCv1AuthorizeEventWithDigest(0xc42009a000, 0x14f80a0, 0xc4200882a0, 0xc42050ef50, 0xc4204167a0{"method":"AttributeSv1.ProcessEvent","params":[{"Tenant":"cgrates.org","ID":"","Context":"*sessions","Time":null,"Event":{"Account":"1001","Destination":"1002","OriginID":"1-21969@10.0.0.7","RequestType":"*prepaid","SetupTime":"1521739356"}}],"id":0}
, 0x4abb01, 0xe36720)

#/usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/sessions/sessions.go:1477 +#0x33c

github.com/cgrates/cgrates/apier/v1.(*SessionSv1).BiRpcAuthorizeEventWithDigestT 2018/03/22 17:23:39.777296 127.0.0.1:2012 -> 127.0.0.1:37216 [AP]
(0xc420582718, 0xc4200882a0, 0xc42050ef50, 0xc4204167a0, 0x0, 0x0)
    /usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/apier/v1/sessions.go:100 +0x58
github.com/cgrates/cgrates/apier/v1.(*SessionSv1).BiRpcAuthorizeEventWithDigest-fm(0xc4200882a0, 0xc42050ef50, 0xc4204167a0, 0x0, 0x0)
    /usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/apier/v1/sessions.go:40 +0x48
reflect.Value.call(0xeb6740, 0xc42015eff0, 0x13, 0x101335d, 0x4, 0xc420320f30, 0x3, 0x3, 0x411101, 0xf6cea0, ...)
    /usr/local/go/src/reflect/value.go:434 +0x91f
reflect.Value.Call(0xeb6740, 0xc42015eff0, 0x13, 0xc4204de730, 0x3, 0x3, 0x71c52b, 0xc4200882a0, 0xc4204de770)
    /usr/local/go/src/reflect/value.go:302 +0xa4
github.com/cgrates/cgrates/vendor/github.com/cenk/rpc2.(*Client).readRequest.func1{"id":0,"result":null,"error":"NOT_FOUND"}
(0xc42029e680,
0xc4200882a0#, 0xf65800, 0xc42050ef50, 0x16, 0xe36720, 0xc4204167a0, 0x16, 0x1, 0xc420165320, ...)
    /usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/vendor/github.com/cenk/rpc2/client.go:151 +0x12d
created by github.com/cgrates/cgrates/vendor/github.com/cenk/rpc2.(*Client).readRequest
    /usr/local/goapps/src/github.com/cgrates/cgrates/src/github.com/cgrates/cgrates/vendor/github.com/cenk/rpc2/client.go:169 +0x25b
###