From 1a20c33632cfd58c128c17136461eb9ac708eb98 Mon Sep 17 00:00:00 2001
From: hasezoey <hasezoey@gmail.com>
Date: Sun, 7 Aug 2022 11:01:22 +0200
Subject: [PATCH] fix(ChangeStream): try to fix "cannot read property
 fullDocument of undefined"

---
 lib/cursor/ChangeStream.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/cursor/ChangeStream.js b/lib/cursor/ChangeStream.js
index dc1ad500d79..0158066c1f7 100644
--- a/lib/cursor/ChangeStream.js
+++ b/lib/cursor/ChangeStream.js
@@ -54,7 +54,7 @@ class ChangeStream extends EventEmitter {
 
         ['close', 'change', 'end', 'error'].forEach(ev => {
           this.driverChangeStream.on(ev, data => {
-            if (data.fullDocument != null && this.options && this.options.hydrate) {
+            if (data != null && data.fullDocument != null && this.options && this.options.hydrate) {
               data.fullDocument = this.options.model.hydrate(data.fullDocument);
             }
             this.emit(ev, data);