From f0a8aca6e10064fb16daefff9e22dcc20a831868 Mon Sep 17 00:00:00 2001
From: Charlie Smurthwaite <netmaster10000@yahoo.com>
Date: Mon, 15 May 2023 00:52:32 +0100
Subject: [PATCH] fix: duplicate string before modifying it to prevent frozen
 string errors

---
 lib/postal/message_db/delivery.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/postal/message_db/delivery.rb b/lib/postal/message_db/delivery.rb
index e5d0e8c..f06c76b 100644
--- a/lib/postal/message_db/delivery.rb
+++ b/lib/postal/message_db/delivery.rb
@@ -48,7 +48,7 @@ module Postal
           message: @message.webhook_hash,
           status: status,
           details: details,
-          output: output.to_s.force_encoding("UTF-8").scrub.truncate(512),
+          output: output.to_s.dup.force_encoding("UTF-8").scrub.truncate(512),
           sent_with_ssl: sent_with_ssl,
           timestamp: @attributes["timestamp"],
           time: time