From c6729cf9635440d02884e15065e4ed59bc74a9fa Mon Sep 17 00:00:00 2001
From: crusader <crusader@loafle.com>
Date: Thu, 2 Nov 2017 20:06:19 +0900
Subject: [PATCH] ing

---
 registry.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/registry.go b/registry.go
index 4da4922..8f926b2 100644
--- a/registry.go
+++ b/registry.go
@@ -98,9 +98,13 @@ func (rr *rpcRegistry) Invoke(codec protocol.RegistryCodec) (result interface{},
 
 	if nil != methodSpec.returnType {
 		result = returnValues[0].Interface()
-		err = returnValues[1].Interface().(error)
+		if nil != returnValues[1].Interface() {
+			err = returnValues[1].Interface().(error)
+		}
 	} else {
-		err = returnValues[0].Interface().(error)
+		if nil != returnValues[0].Interface() {
+			err = returnValues[0].Interface().(error)
+		}
 	}
 
 	return