From c55cad980d61550e0fb5139845990cb00b555985 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Wed, 1 Dec 2021 14:15:39 +0200
Subject: [PATCH] Fix handling read receipts where target is unknown

---
 user.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/user.go b/user.go
index c275a26..46f593d 100644
--- a/user.go
+++ b/user.go
@@ -748,7 +748,11 @@ func (user *User) handleReceipt(receipt *events.Receipt) {
 		}
 	}
 	if receipt.Sender.User == user.JID.User {
-		user.SetLastReadTS(portal.Key, markAsRead[0].Timestamp)
+		if len(markAsRead) > 0 {
+			user.SetLastReadTS(portal.Key, markAsRead[0].Timestamp)
+		} else {
+			user.SetLastReadTS(portal.Key, receipt.Timestamp)
+		}
 	}
 	intent := user.bridge.GetPuppetByJID(receipt.Sender).IntentFor(portal)
 	for _, msg := range markAsRead {