From 8b3514d876d9b9584c45b4a765cf7344f3479b25 Mon Sep 17 00:00:00 2001
From: jz <582151+jiazheng@users.noreply.github.com>
Date: Mon, 12 Jun 2023 17:16:03 +0800
Subject: [PATCH] request may be null when _handleSubscribe called. fix it.

---
 lib/client/doc.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/client/doc.js b/lib/client/doc.js
index 7bb47c33f..27bf0452a 100644
--- a/lib/client/doc.js
+++ b/lib/client/doc.js
@@ -311,7 +311,7 @@ Doc.prototype._handleSubscribe = function(error, snapshot) {
   this.inflightSubscribe = null;
   var callbacks = this.pendingFetch;
   this.pendingFetch = [];
-  if (request.callback) callbacks.push(request.callback);
+  if (request && request.callback) callbacks.push(request.callback);
   var callback;
   if (callbacks.length) {
     callback = function(error) {
@@ -319,7 +319,7 @@ Doc.prototype._handleSubscribe = function(error, snapshot) {
     };
   }
   if (error) return this._emitResponseError(error, callback);
-  this.subscribed = request.wantSubscribe;
+  this.subscribed = request && request.wantSubscribe;
   if (this.subscribed) this.ingestSnapshot(snapshot, callback);
   else if (callback) callback();
   this._emitNothingPending();