From 1355196b7c07a5d4f3319a2b0a357a8f7972a669 Mon Sep 17 00:00:00 2001
From: Dreamacro <8615343+Dreamacro@users.noreply.github.com>
Date: Thu, 18 Mar 2021 23:19:00 +0800
Subject: [PATCH] Fix: grpc connection panic

---
 component/gun/gun.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/component/gun/gun.go b/component/gun/gun.go
index 4d2b8fd14..0da84a0dc 100644
--- a/component/gun/gun.go
+++ b/component/gun/gun.go
@@ -81,6 +81,8 @@ func (g *Conn) Read(b []byte) (n int, err error) {
 			g.buf = nil
 		}
 		return
+	} else if g.response == nil {
+		return 0, net.ErrClosed
 	}
 
 	buf := make([]byte, 5)