From c3808bbe892fe1ae62c9c00e0c244517c49b917c Mon Sep 17 00:00:00 2001
From: Noah Petherbridge <root@kirsle.net>
Date: Sun, 3 Dec 2023 21:46:14 -0800
Subject: [PATCH] Fix a null pointer exception if a DM partner goes offline

---
 pkg/handlers.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkg/handlers.go b/pkg/handlers.go
index 849cb62..c861b9c 100644
--- a/pkg/handlers.go
+++ b/pkg/handlers.go
@@ -207,6 +207,10 @@ func (s *Server) OnMessage(sub *Subscriber, msg messages.Message) {
 		if err == nil && rcpt.Mutes(sub.Username) && !sub.IsAdmin() {
 			log.Debug("Do not send message to %s: they have muted or booted %s", rcpt.Username, sub.Username)
 			return
+		} else if err != nil {
+			// Recipient was no longer online: the message won't be sent.
+			sub.ChatServer("Could not deliver your message: %s appears not to be online.", msg.Channel)
+			return
 		}
 
 		// If the sender already mutes the recipient, reply back with the error.