From 19bec43925cfa6411dce99457aab159a27bcd1df Mon Sep 17 00:00:00 2001
From: Tor Colvin <tor.colvin@couchbase.com>
Date: Sun, 2 Nov 2025 20:27:04 -0500
Subject: [PATCH] CBG-4924 ignore updating local rev if
 BlipTesterCollectionClient is closed

---
 rest/utilities_testing_blip_client.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rest/utilities_testing_blip_client.go b/rest/utilities_testing_blip_client.go
index 912015f897..cbe748de0f 100644
--- a/rest/utilities_testing_blip_client.go
+++ b/rest/utilities_testing_blip_client.go
@@ -952,6 +952,11 @@ func (btcc *BlipTesterCollectionClient) getAttachment(digest string) (attachment
 func (btcc *BlipTesterCollectionClient) updateLastReplicatedRev(docID string, version DocVersion, msg *blip.Message) {
 	btcc.seqLock.Lock()
 	defer btcc.seqLock.Unlock()
+	// If this fires after a replication is completed, ignore it since BlipTesterCollectionClient.Close will zero
+	// out all documents
+	if btcc.ctx.Err() != nil {
+		return
+	}
 	doc, ok := btcc._getClientDoc(docID)
 	require.True(btcc.TB(), ok, "docID %q not found in _seqFromDocID", docID)
 	doc._latestServerVersion = version