From 02adca4bc1cc50a232703d2b48ea41a18fa82c93 Mon Sep 17 00:00:00 2001
From: Sam Wen <samswen@gmail.com>
Date: Tue, 11 Jan 2022 09:06:25 -0500
Subject: [PATCH] fix: fix exceptions on messages of client side cache (#1479)

when works with the new server assist client side cache feature, redis sends single string "__redis__:invalidate" from server.
so reply[2] is null, the update fixes the issue
---
 lib/DataHandler.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/DataHandler.ts b/lib/DataHandler.ts
index eb062ae3..bce39173 100644
--- a/lib/DataHandler.ts
+++ b/lib/DataHandler.ts
@@ -119,7 +119,7 @@ export default class DataHandler {
       case "message":
         if (this.redis.listeners("message").length > 0) {
           // Check if there're listeners to avoid unnecessary `toString()`.
-          this.redis.emit("message", reply[1].toString(), reply[2].toString());
+          this.redis.emit("message", reply[1].toString(), reply[2] ? reply[2].toString() : '');
         }
         this.redis.emit("messageBuffer", reply[1], reply[2]);
         break;