From f3482d7cd8480d3aff06c1d5bee3a39f4e6b764a Mon Sep 17 00:00:00 2001
From: ginuerzh <ginuerzh@gmail.com>
Date: Tue, 31 Jan 2023 18:05:36 +0800
Subject: [PATCH] fix nil route panic

---
 chain/router.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/chain/router.go b/chain/router.go
index 95edad6..57e0ecc 100644
--- a/chain/router.go
+++ b/chain/router.go
@@ -204,7 +204,7 @@ func (r *Router) Bind(ctx context.Context, network, address string, opts ...Bind
 		var route Route
 		if r.options.Chain != nil {
 			route = r.options.Chain.Route(ctx, network, address)
-			if len(route.Nodes()) == 0 {
+			if route == nil || len(route.Nodes()) == 0 {
 				err = ErrEmptyRoute
 				return
 			}
@@ -219,6 +219,9 @@ func (r *Router) Bind(ctx context.Context, network, address string, opts ...Bind
 			r.options.Logger.Debugf("route(retry=%d) %s", i, buf.String())
 		}
 
+		if route == nil {
+			route = DefaultRoute
+		}
 		ln, err = route.Bind(ctx, network, address, opts...)
 		if err == nil {
 			break